4k will be a better purchase. Per the store salesman, with 1080p, boundaries of human faces will be pixelated - I can imagine that not being a good viewing experience.
Non ultra-short-throws may not work for our den because they probably require longer distance between projector and screen. Need to confirm once.
In our den, where we are thinking of setting up the projector, a 100 inch screen could be too big and 80 inch more preferable. Need to check.
We should start with a projector and see how it works first. Screens and audio systems can come later.
Screen:
We can get ambient light reduction screens but that may not be necessary for our den because it only has a small window, so not too much ambient light.
There is an option for “projector paint” too. Or we can color the wall white.