I agree with several other comments in that this feature is a fantastic addition with one caveat. In order to make this even remotely useful we need the option to gather feedback and responses based on what we're presenting, not the entire form in one go before we get any data.
Right now, if you display the first question on the form and someone accesses the QR code they will need to fill out the entire form and hit "Submit" before any of the responses are displayed. Presenters need the ability to display a single question, gather instant responses to that one question, then move to the next question. Forcing viewers/audience members to fill out the entire form just to get information to display for the first question completely negates the ability to use this tool for education purposes or to lead a reasonable discussion.
The only work around is to create a different form for every question. That may work in some limited use cases within a PowerPoint deck, but certainly not for widespread application.