I'm not so sure. I've been using a projector as a TV for something like four years straight: no TV at home, only a projector. As a bonus the living room becomes a home cinema. I didn't see much downsides. Zero issue. No ads. Cheaper than a TV for a much wider diagonal and a more "cinema'ish" picture too (I hate it when movies look like cheap sitcoms on modern TVs).
And as many of these are made to show slides and whatnots in corporate settings, ads are a big no-no.
I think more people should seriously consider that option.
EDIT: well I remember one issue... I decided to fix it and it took longer than the time it'd have take to hook a TV. But I did it exactly once, used some fishtape to pull HDMI cables in the system ceiling and family was good to go for years.