Aaah, but you just need to know, the only reason they got so good is from knuckling down and having some good dedication. Natural talent only gets you so far, keep practicing and you'll be as good as them - no doubt about it.
That kinda keeps me going (Though I draw inspiration from ConceptArt.org, same principle but more 2D focused.)
the problem with that for inspiration is, i would never be able to make stuff like that, its way to complicated, i mean, i had trouble getting the deoderant can looking right, and that was some primitives and booleans, with a few minor edits :S
But it helps you improve in leaps and bounds..
You don't just go there to gawk at the epicness, think about what makes it epic.
Sign up for an account and start getting your works critted by the best in the business.
They arn't some random freaks of nature that decided to make a site, they are people just like you that worked hard to get to where they are..