Microsoft's [Surface is estimated to cost \\(10K](https://www.microsoft.com/en-us/surface) in its first incarnation. I've already had an interesting conversation with an entrepreneur friend who has an application that he thinks would be fantastic on Surface, but \\)10K for the hardware makes it a non-starter. Although I'm sure Surface will eventually cost less, I'll be talking to my friend about \<a href="http://wearables.unisa.edu.au/mpx/"" target="_blank" rel="noopener noreferrer">Multi-Pointer X Server, which has just added multi-touch support. Heck, might be my first commercial Mono project...