A while ago I viewed a thread like the title. I looked thru the thread and decided to purchase a TCL 49" Class (48.5" Diag.) 4K Ultra HD Roku LED LCD TV and TV mount from Costco. Found a $289 price while mostly the TV was running at about $329 on the web.
I mounted it and connected it to my HP Pavilion Laptop 17 in thru the HDMI port. The only issue was that my laptop computer vintage 2012 was only giving me 1920 x 1080. Lucky for me the computer was fairly hi end at the time and had 1 USB 3.0 port.
So even though it looked great when I moved stuff up to the screen it was still 1920 x 1080. Decided to do a search and found the following on Amazon.
This connects to the USB 3.0 port. Wow what a difference. Now I can get 3840 x 2160 and other combinations.
For those that look for a way to get 4k from a laptop this might be your answer. This picture of the screen does not do it justice. Hope this helps someone out there.
This is my New Shack / Man cave
And finally have the stuff out of the bedroom.
This pic was before putting the adapter on the computer