From Monochrome to Multitouch: A History of PC Displays
Display Wars
From 1981 until the early-2000’s, the preferred display technology for desktops was the cathode-ray tube (CRT), which ranged in size from 12-inches to 21-inches diagonal measure.
The first monochrome liquid crystal displays (LCD) for computers were built into mid-1980's laptop computers such as the HP-110 shown below. The first laptops with LCD color displays were introduced in 1989, but ran at low resolution CGA (640x200) or double-scan CGA (640x400), while the first LCD color screens with VGA resolution appeared in 1992.

Early color LCD displays used slow passive-matrix displays with washed-out colors, but by the mid-1990’s, active matrix displays (which use a transistor for each pixel), provided improved color and faster response. Starting in the early 2000s, LCD displays began to show up on desktops, and by 2003, LCDs outsold CRTs. A KDS RAD-5 similar to the one shown below was the author’s first desktop LCD panel and is still going strong after 9 years.

Starting in about 2004, widescreen LCDs in various sizes began to push aside 4:3 aspect ratio LCDs, and most recent 19-inch or larger displays support 720p HDTV, while most recent 22-inch or larger displays support full 1080p HDTV. The current size champion is the 30-inch LCD with resolutions up to 2560x1600, such as this HP ZR30w (chosen for the 2010 Dream Machine).

'Greening' LCD Panels
The latest trend in LCD panel design is the use of LEDs for backlighting, providing lower power usage and better black levels while eliminating the need to use mercury in the panel's construction (mercury is a component of fluorescent tubes and CFL's, and is a dangerous element).
3D Viewing
If you want to see the 3D action on your display in true 3D, you need special glasses and a monitor or HDTV capabole of a 120Hz refresh rate. NVIDIA has you covered right now with its GeForce 3D Vision kit, and its 3D Vision Surround now supports 3D viewing on three displays, as tested recently by our own Alan Fackler.
AMD supports 3D graphics, too, but you'll need to acquire 3D glasses from third-party manufacturers such as Sapphire. With more data going to the display(s) than ever before, the venerable VGA port isn't up to the challenge.
Display Interface Wars - DVI, HDMI, and DisplayPort
LCDs, unlike CRTs, use digital signaling. But when an LCD is plugged into a VGA (analog) port, an extra conversion step is required. The Digital Visual Interface (DVI) port developed in mid-1999 supports both pure digital connections (DVI-D) or the option to connect to either digital or analog displays (DVI-I) with an adapter. DVI-I ports are found on most graphics cards and some systems with integrated video.

Image Source: author's hardware collection
Many recent graphics cards and systems with integrated video now also include an HDMI port. HDMI carries HD-quality video and audio signals, enabling direct connection to HDTVs and modern home theater systems.

Image Source: author's hardware collection
DisplayPort and ATI Eyefinity
Unlike DVI and HDMI, the DisplayPort 1.2 standard developed by the VESA tradegroup in 2009 enables daisy-chaining of displays and supports up to six displays. The ASUS Matrix HD5850 card shown includes an HDMI port (top), a DisplayPort port (middle), and a DVI-I port (bottom).

DisplayPort can use powered adapters to drive displays with DVI or VGA ports, it can group multiple displays into a single logical unit, and it can daisy-chain displays. AMD takes advantage of these features in its Eyefinity surround gaming technology. Eyefinity is supported by AMD's Radeon HD 5400-series (and higher) GPUs and can display a single game across six independent monitors.
Touchscreens
Touchscreen technologies have been around for years for such duties as information kiosks, but didn’t become common in PCs until the development of tablet-based computers starting in the mid-2000s. The development of Windows 7, with its support for multitouch capabilities (see the sample of Microsoft Surface below), is enabling touchscreen portables to break out of the traditional medical and business uses into mainstream use.

On the Horizon
Since the first IBM PC and its monochrome green phosphor display rolled out of the IBM Boca Raton facility in 1981, display technologies for PCs have gone through almost unimaginable changes. Who would have believed then that computer displays could be used as completely satisfactory replacements for TVs? That 3D viewing would be possible in the living room? That computers could be used to replace darkrooms and slide projectors for photo processing and viewing? The advances in PC display technology have made all of these uses common.
What's next on the display horizon? Put on your wizard's cap, fire up your crystal ball, click Comment, and tell us what you see in the future of PC display technology. And, while you're at it, share your favorite stories of the best (and worst) of PC displays and graphics cards past.