I have a pi3 with a 20" touchscreen that I'm using. Raspbian booting to magic mirror. It works, but Magic Mirror is slow bloated/slow that I'm not happy with it. I'm about ready to make my own QT based signage - I suspect it will be much more performant as well as more flexible. Still it is a lot of work and so I hesitate to bother (even if version one could be done in a day - I have enough other projects).