After one door closes, another is supposed to open, or at least that's what people always say. Maybe it's true, because after Hewlett Packard closed the door on its TouchPad tablet, the OEM opened its door to the HP Slate 2 Tablet PC. The Slate 2 is an 8.9-inch slate HP says is ready for instant deployment for business and vertical markets such as education, healthcare, government, retail, and any other job that doesn't always keep workers tethered to a desk.