<<<I'm not sure people need touch interaction with Alexa instead of voice...or even added...>>>
Yes, that is what is not sure.
MVIS is arguing it will help the companies encourage people to use apps that make them money. I can see the possibility. (Maybe you don't.) What is less clear, is whether it can be achieved via touch screens, or whether interactive projection is better.
Maybe with a smart speaker with visual info and touch/interactive (plus voice) control, some people won't need a laptop anymore....or even a tablet. Just their phone, and smart speaker. Depends what they do on their devices.