I won't use the term tablet as a catch-all: 2010 was the year of the iPad, a product that focused on design and function, in that order.
Design involves form and function and yet has been ignored by many companies who manufacture personal communication products. Why would one ever buy something that is poorly designed and ugly? We want products that make us smile when we see them, products which make us want to pick them up and use them. But they have to work well and intuitively. No one wants to have or need a thick manual for a cell phone, and no one wants to ask his children how to operate a computer.
The iPad is a metaphor for the future. We know that new, even more innovative products are coming: but this one is here, pointing the way to new personal, portable approaches to creating and consuming.
See what it will do for you. You already know how to use it.