Mostly saving money. Digital Signage is what you want if you want a "dumb" display, but they don't have TV tuner (which may or may not be an issue) and also are rated for 24/7 use and thus much more expensive than consumer level TV's at the same size. They usually have minimal image processing and very low input lag as well.
If you don't mind dropping the money then go for it, but I think most people will want to go for consumer model for much less.
Also I am not sure if those support HDR or other features that may be desirable in a consumer display.
digital signage is <2x the price of consumer TVs. i'm skeptical that an independent can do a comprable product for less, when normal consumer TVs are subsidized by their data collection and advertising businesses, and operate at the scale they do.
HDR is a good point, i haven't had a chance to use any of those newer TV features so i'm not sure what i'm missing there. but that's the sort of thing i'd wait a few years for to see if they stick around, or if they're just a fad to sell more TVs like 3D was.
HDR is very well adopted. Basically all 4K content now includes it. 3D was indeed a fad. But HDR is standard on 4K movie as well as video game consoles (excluding Nintendo Switch)
If you don't mind dropping the money then go for it, but I think most people will want to go for consumer model for much less.
Also I am not sure if those support HDR or other features that may be desirable in a consumer display.