keep it, pass it down a few generations. sell it as an antique for millions. thats what im doing with my uncles old pc... tho i think one that still works would be even better, as a demonstration of how crummy our software is compared to the 3d-monitor supoorting games of the future, and OS's that dont make you cry, not that'll take a while. and also completely fortified computers agains viruses/virii and hacks. having to reformat will be a thing of teh past. and then child pr0n become legalised... maybe thats going to far.
edit: 3d monitor basically being... well... i guess like a holodeck on starwars... or maybe even more like a monitor thats kind of like a box... and things move around in this box, made by the game maker (using darkbasic 3k) he doesnt model with polygons, he models ionised particals and antimatter, which prance back and forth around your screen, insteam of smaller and bigger on a 2d surface