if you streamed it at the proper bitrate you would be using a ton of data at 4k, even streaming from my own server to my tv sometimes is too much since my TV only has a 100mbit nic on it on films like 1917 the bit rate would spike on some scenes and it will start to stutter or stop playing all together, for that I had to use my xbox or maybe Ill invest in a roku or shield with a 1gb nic. but for regular streaming you might get the resolution in 4k but you'll see in dark scenes these like squares and artifacts because of how its compressed down to be able to get to you through the internet while not annihilating your bandwidth