April to June 2011 is most likely for the next major update; the small processor bump will come in September or October of this year. I predict we'll see USB 3.0, an upgraded GPU, bumps in processing power, and bumps in battery life in 2011.
I honestly can't see a bump in battery life. But that's just me.
I was about to buy a new MBP but now i am confused? Should i buy or wait i really dont care about cpu..But GPU is really important for me..