Getting a 4k monitor the size of a large-screen TV (65in+) is hard and expensive. A projector is great only in very ideal conditions (proper white and smooth backdrop, dark room with no light interference). Dumb TVs used in digital signage are usually not on par with regular TVs in terms of display quality, and they are also expensive. The best budget-friendly option is a disconnected 4k TV and a streaming box.
Getting a 4k monitor the size of a large-screen TV (65in+) is hard and expensive. A projector is great only in very ideal conditions (proper white and smooth backdrop, dark room with no light interference). Dumb TVs used in digital signage are usually not on par with regular TVs in terms of display quality, and they are also expensive. The best budget-friendly option is a disconnected 4k TV and a streaming box.