Look, it's stupid. You're stupid. Everyone is stupid.
Buy this. It has two HDMI inputs on the back. Hook your computer to one--your sound will even come out of the speakers, and stop coming out when you switch the TV off--and an HDMI switch to the other. Plug your Wii U, PS3 (bluray player), etc., into the HDMI switch. Plug your legacy systems (NES, PS2) into an Audio-Stereo-Component switcher, with composite systems routed properly (the same pins are used for AVC as AVRGB, with the Red pin reused for Composite; just switch to Composite input when using your SNES).
Now you can fullscreen RWBY right on RoosterTeeth's site from your computer, onto 1080p HDTV. You can switch to the Wii U or PS3 and watch your Netflix and Amazon Instant Video right there, or even a BluRay or DVD--assuming you're not just using the computer to play Amazon Prime Video straight on screen.
You put a TV somewhere, you plug a computer into it. In the extreme case, you can plug a $50 Roku into it instead of a computer or game console, and pull Hulu and Netflux and Amazon up that way. You know, instead of plugging in a $35 ChromeCast and spanning a Web browser tab in from another room. Most likely, you have a friggin' laptop or another PC in that room.
I have 6 ways to watch an Amazon, Netflix, or YouTube video just as a matter of course, on a ginormous HDTV.