If it is a dedicated room I will suggest a projector like benq or viewsonic entry level ones around 1.5l with warranty. Actually the method in which the projectors output 4k is interesting one is the native 4k one which are insanely expensive the other is the faux 4k which though use lens shifting technology to project 4 full hd images but they also are cheaper and offer significantly detailed images than a full hd ones.
So in a dedicated room go for a projector and i would suggest a faux 4k one which will be good enough for the next 3-4 years
So in a dedicated room go for a projector and i would suggest a faux 4k one which will be good enough for the next 3-4 years