Here are some words and phrases you used that make no sense to most people:
just Eees in a bigger case
watercooling and SLi
GPU every 3-4 years, and/or cpu
intel/amd cpus and motherboards and Ati/nvidia cards.
(eide drives etc..)
Ubuntu
Then there is some more other posters have used:
dual pentium 4 cpu at 3ghz, and an ATI radeon 2600xt
Celeron --> Pentium --> Core 2 --> Quad...
And more on the next page...
Here's the thing: that stuff may simple to you, and is vaguely apparent to me, which I cold figure out after a bit of research, but the vast majority of people, including console gamers, will have no idea what you're on about here. The whole idea of building our own PC is alien. If we were to think about making the transition to PC gaming, we would wander down to Curry's, Dixons or Dell etc, and look at the prices. We wouldn't have the confidence to make our own. It's like supermarkets. Theoretically, it's easier to grow ur own veg, raise some chickens, etc. But it's easier in the short term just to wander down to the supermarket and buy it, prepackaged, after a hard day at work. That's why consoles are popular.