People would not be happy lol..
I'm still considering a Vita myself, but I can tell you that I expect a long life span of the system, maybe 7+ years. After this long gen of consoles I expect my systems to last longer then just a year.
To spend $250-$300+ on a hand held system only to have production halted just over a year on the market would create a rather massive backlash and quite a few people would lose faith in Sony.
It's just that simple.