Microsoft Surface provides a 30" touchscreen in a table-top arcade-style format that is also bluetooth-aware.
Drop $10k and you can get your own.
I guess it's all about the software and the bluetooth-aware stuff, but couldn't you "roll your own" with a cheap Dell & this $700 32" touchscreen?
http://www.nextag.com/Elo-Touchsystems-ELO-32-79496386/prices-html
