Their demo is also mobile app development using touchscreen for testing apps in the simulator.
Testing touchscreen experiences for other devices is the main thing I can imagine actually using this for.
Pretty useless, it's easy to simulate touches and gestures already.
This is the one thing I'm rather excited to use the touchscreen for. Would be genuinely useful to me right now. Beyond that though...... I can't see using Touch much.
I hope this sells well enough that they might later go the EXTRA step to a Pencil supported 360-hinged MBP.
I'm a hardcore iPad Pro + Pencil lover. And I'm very tired of carrying both a MacBook for the full OS + keyboard, PLUS a whole separate tablet for sketching, illustration, annotation, etc.