I just got the PS3 when the Slim launched.
Unless you need a great Blu-Ray player, in my opinion the cost is unjustified. But my tastes in video games have changed, and much of the demos I've played for the big releases don't appeal to me, when they would have just a couple years ago.
I love Uncharted. And if you want a Blu-Ray player, the PS3 plus Uncharted is well worth the money in my opinion. Grab Planet Earth on Blu-Ray, too.
Also, FYI, I believe it is PS1 backwards compatible.