The HDMI cable was never my issue with PC gaming on the couch -- it was never being able to get comfortable using it on the couch with anything other than a controller. And you could never just exclusively use a controller -- there's always something you need a KB/M for. Yeah, wireless, bluetooth, long *** USB cords -- but without a nice desk surface to use them on (lap desks don't count) it wasn't ever a thing I liked.
PC gaming belongs at a desk, as much as I would love to use my OLED + HT setup for great gaming.
Consoles assume the controller for everything, and they are just set up for it better. Steam big screen mode ~almost~ gets there... but I can do that via Steam Remote Play and not need to move the PC over. It's not quite as good as playing locally, but for the amount I use it (almost never on the TV, but I use it a ton playing on laptop on the couch while wife watches her stupid TV shows she can't watch without me, for some reason), it's good enough.