You should go on youtube and search for "4k video ultra hd" and see if you can play them on the TV. While you may not be able to use UHD blu ray you maybe to download digital files at those resolutions.
You'll break nothing if you just try - connect your laptop to the TV, configure it as Extended display, and see what resolutions you can set.
Tried that, I get 3840x2160p(recommened) and also 4096x2160p Full screen all at 30hz. Even if my laptop doesn't play bluray, will i still get the UHD experience from the 4k movie?
You should go on youtube and search for "4k video ultra hd" and see if you can play them on the TV. While you may not be able to use UHD blu ray you maybe to download digital files at those resolutions.