Apple are rumoured to be setting contracts with media/news companies, so they obviously plan on not just a table, but a whole host of other media devices.
Microsoft obviously saw it as enough of a threat to make the Courier public knowledge
I myself think the Courier sounds far superior even though that is definately in a later stage of development.
If I could use a courier screen as a keyboard then I have a netbook/notepad/media tablet all in one with OneNote integration.
The tablet market is going just taking off, so I would imagine seeing this sort of thing between 2011 - 2013. Even though we are seeing a lot of tablets from hardware manufacturers they are simply laptops with one or two screens and I havent seen anything that will compete.
Lets just hope they get the battery life sorted!