It's likely tablets will continue to grow in power, storage and size. If they hope to replace laptops, they will need to be bigger and rumors abound that Apple will introduce a 12 inch model this year. This could be related to the recent agreement between Apple and IBM which is beginning to bear fruit - including their first roll out of business apps.
Speaking of replacing laptops, a good keyboard is a must companion for your tablet and the latest models by Logitech are astounding. I do most of my typing - including this newsletter - on the one shown above at a coffee shop recently. If you want to use a tablet as a productivity tool, you really should get a keyboard.