Could you use this effectively while moving? Is the device going to jostle about? Can you keep your hand that steady (in relation to the projection)? Can you do this while standing, slouching in a chair, walking, and/or riding in a vehicle? Could you use it discretely, like in a meeting or waiting room?
What are the positive aspects? I don't see any, this looks terrible to me, a waste of money for both investors and consumers
I'm limiting my points to the physical usage concerns, there are more concerns if we broaden the context, many other commenters have pointed them out. This is not even the full list of physical concerns. What people wear will have a big impact too
