The interactive polling stuff is neat, though it seems like it would occupy a lot more time in a presentation than the old-fashioned "show of hands" it's replac

The interactive polling stuff is neat, though it seems like it would occupy a lot more time in a presentation than the old-fashioned "show of hands" it's replacing (given the time an audience would need to pull out their phones and try to scan the QR / type the URL / send the SMS). The on-device view of the current and upcoming slides (as well as speaker notes, and maybe even drawing) are also built into the Google Slides app's UI when you are casting to a Chromecast.