I was just browsing iBuyPower.com and saw that there was a PCI-Express 512 MB GeForce 6800-Ultra video card. There are video cards that are much less powerful technically than this one, and they run all of today's applications without a glitch. Sure, this website put it at something like $800, but still. I also saw an AMD Athlon-64 bit 4000+ cpu, and I saw something that was called FX-55 or something to that extent, which sounded even mroe powerful. There are multiple terrabyte hard drives out there. My point is, is there any real reason to have such powerful hardware?
Then programs will have to catch up with you, if your "power"=what programs use, you'll have to upgrade everytime something new comes out. With all this you upgrade less. Making you happy!