Envision TV AR is a new Android and iOS app designed by Sony to help users reluctant to go outdoors shop for a new big-screen device in any case. It uses the augmented-reality (AR) features of a smartphone to virtually place Sony TVs in any given room. Therefore, the user can "measure" various models for optimal fit and placement according to their available space.
https://www.notebookcheck.net/Sony-launches-a-new-AR-app-to-help-users-choose-which-of-its-TVs-to-buy.465679.0.html
I always buy the smallest tv, so that when i move i dont need to hire a team of professional to help me