The PS3 consoles were selling for $269.99 at Costco last week. I would either wait for a good deal or wait for a price cut later this year (assuming there will be one). I personally would wait for a discounted Move bundle-- that would be a lot of fun with games like Killzone 3, Socom 4, LBP2, Sports Champions, and Tiger Woods '11.
PS3 is a great console. I like it much better than my 360 because of the blue-ray player, the free online, and all the cool games coming out in 2011. I am actually going to cancel my Xbox Live subscription when it ends this year. 360 is pretty much the same as the PS3 except for paid Xbox Live, Halo, Gears of War, Forza, Fable, and Kinect.
The PS4 may come out in 2012 or 2013, but the PS3 will still be a strong console for several years after the PS4 release. My PS2 was my only gaming machine until late 2009-- almost 3 years after the PS3 release. Since you are a late adopter anyway, you probably won't buy the PS4 right when it is released. So why are concerned about this?
Two last words for you: Uncharted 3!
Most anticipated games of 2011:
Uncharted 3,Legend of Zelda: Skyward Sword, Rocksmith
Modern Warfare 3, Super Mario 3D