You can mount them to the back of your tv, or in a closet or media cabinet, then use ir or rf repeaters to send the signal from near the tv to your remote equipment.

1. Many people are buying "smart" TVs, connecting them to the Internet via wi-fi, and watching only streaming content. The only cable the TV requires is a power cable.
2. For a TV requiring more cables, one solution is to place a cabinet below the TV (for example) and run the required cables between the TV and cabinet through the wall. Here's a youtube video that explains how to do this.

Many use remote installed equipment connected with HDMI cables. As mentioned above, you can also mount the equipment to the back of the TV. It is also possible to create a niche behind the TV, depending on the condition of the wall. Once you've solved the location of the equipment, you will likely need a good remote with ir and rf functions. (https://www.logitech.com/en-us/product/harmony-elite?crid=60)

Good luck to you.