Upgrades continue to this day! As an example, I updated my last household PC to Windows 7 Ultimate (up from Windows MCE 2004 from HP: a frankenstein OS).
It runs better than ever (2.4Ghz, 2GB memory). Media Center works great (looks like MCE 2005). For a 7 year old PC with AGP graphics (7600 GT) it's surprising how well Windows 7 performs. Assuming nothing breaks, it's still a good 'dev test server' for .NET and LAMP work.
Honestly, how gutless can you be? Quite the charades you got going there, congrats! If that's what interests you...