It's a topic worth watching, because everybody and their dog has seen Apple sell 10000000 Ipads in the past 2 weeks and they want a slice of the action, and even a 1% slice is a nice production run in what has always been a very tough market - tablets never really caught on; partly due to antiquated technologies compared to state of the art laptops of the same era.
I am sure no windoze tablet will match the slick finger interface of the Ipad but for aviation it doesn't need to. For aviation, you want a dedicated and simple interface. The Jepp Flitedeck product is one example - that's a crappy, bug-ridden and totally counter-intuitive implementation but the layout is right: some big buttons around the periphery of the screen and that's it.
Also, to update a tablet used for approach plates, you need to be able to dump (sync) a few GB to it fairly fast - over ethernet.
I tested the
Viliv tablet recently but it ran too hot and had a poor screen. An interesting pointer for the future though.