Maybe In 5 years today's top end performance will fit in a tablet, but the top end 5 years from now won't.
And this is important to note here. "Maybe In 5 years today's top end performance will fit in a tablet" is enough to make everyone jump on it. I am confident our technology is moving to a portable domain because the performance of these small devices are
good enough for general computing. The hardcore performance is no longer the main focus in consumer market.
I really say, mobile domain is the future. MS is either too early with Win Mo or too late to update. But, soon you will see the emerging market moving away from traditional desktop computers.