Our TV is on the wall. Velcroed to the back of the TV are an Amazon Fire TV stick, a RetroPie, a SteamLink and an HDMI switcher.
I then have very short HDMI cables for plugging everything into the TV, so they don't stick out and are basically invisible. I then run all of the power cables to a six-gang power adapter that is resting on the TV wall bracket (and is invisible when viewing the TV), and the power cable for that comes down behind the TV, behind the soundbar under the TV, behind the radiator under all that, and across to the power socket on the bottom of the wall.
So I just need to get some trunking to hide that cable, and the power/optical cables that the soundbar uses.
It's surprisingly neat, given how shit I am at DIY and things like that.