my oldest laptop is a 386SX20 with 800x600 greyscale LCD, floppy, 80 meg HD, 4 meg RAM, 28.8k modem. still too small for a decent system build with desktop parts really. cooling and video will be the show stoppers.. and powering it? external PSU? lotsa cables to run..
even older notebooks are still more or less the same size as modern, just the new stuff is vastly more powerful.
I get what your saying but then i remember this
http://www.intelcorechallenge.com/morei ... 40B2E81628
and it just seems like a old laptop could be just as "easy"