This was the year of the iPad. For there to be so much success in such a short time indicates that critical mass has been reached. Even though the tablet form factor has been around since the early 90′s, it was not until Apple delivered the iPad that the market really kicked off.
The rate of change seems to be accelerating. With the iPad 2 coming soon, it is clear that Apple will pursue this path for deeper market adoption.
This is the first post that I am writing from an iPad. This would be difficult to do without the bluetooth keyboard. This is acceptable for a user experience. There are some quirks here and there but it is still good.