We also have been using short throw projector instead of a TV for at least 10 years. An obvious advantage is that the screen size can be huge, but as you mentio

We also have been using short throw projector instead of a TV for at least 10 years. An obvious advantage is that the screen size can be huge, but as you mentioned on the down side this means that you need a relatively dark room. Also, there is a fan noise, which is not much of an issue if you are watching Terminator 3 on full volume with subwoofer turned on, but may be annoying if you are working in a silent environment.