When they started talking about using it as a Bluetooth keyboard, I couldn't help thinking that they wanted an AlphaSmart. Sure enough, they brought it up (albeit, without mentioning that it could be used as a wired keyboard).

The brilliant thing about the AlphaSmart is that is transferred data to the computer as a keyboard. That ensured it was compatible with almost any computer of the era and it will likely support any device that supports USB host mode today.