There are examples of people using the ipad as for more than just a toy. David Hockney, the British artist, is just one. Here is a New York Times article dated Jan. 10th:
the-ipad-is-an-artists-canvas-for-david-hockney
The iPad and other touch-pads may not be perfected yet, but it hasn't stopped many, and varied, artist from exploring its uses.
If one is willing to pay the annual fee to use Microsoft's Office application, it is very possible to write on the iPad and on Window's touch screen computers. I used Apple's bluetooth keyboard and wrote parts of several stories on my iPad (when waking in the middle of the night with an idea) and no waiting for the boot of the PC, just start typing. I used the Notability app at the time because its set to back up to Google docs. I probably won't pay for MS's annual fee but it is a viable option nonetheless.