These things are so freaking cheap, they're like $10 on ebay, and they're the perfect companion to any PC in the living room. They become your remote control for the entire setup. They're both air mice, meaning you can press a button in the middle to make it act like a wiimote to control your mouse on screen, and a full keyboard on the back, and they are universal IR remotes, meaning they can learn functions from your TV remote.
So the same remote can control your PC, and your TV and even your sound system all at the same time. And it's seen by your PC as a standard keyboard and mouse and MCE, so you can even use this stuff on your PC's bios menu if you had to. I've actually used one of these remotes to access my PC bios in a pinch.
Air mice remotes used to be so expensive and hard to find. I got my first air mouse remote in 2004 after watching a mythTV "home of the future" demo where a mythTV server was used as the central media hub for an entire home. The video they put together had people using an air mouse remote to control their TVs. Back in those days, microsoft was pushing windows MCE, which was a built in ten-foot UI for windows XP, and they had an MCE air mouse remote from gyration. But it was super expensive, like $150. Despite that, I wound up with four, and used them all up until they basically disintegrated.
These generic, $10 clones they have flooded on ebay now are a damn godsend. I have dozens upon dozens of them, when I build people raspberry pi kodi machines, I throw them in with them. They're one of the very best things to pick up if you're into PC gaming, because they fit right in with the TV. They solve all the keyboard/mouse problems you might have for fringe cases where steam input fails.
In addition to these remotes being universal and learning remotes, you can also remap any key or button on the remote with your PC using a program like AutoHotKey or EventGhost in windows, or by altering XKB in linux.
Absolutely essential to anybody who uses their PC in their living room with their main TV. These things work on anything that can recognize a mouse and keyboard, btw, including consoles, phones, and even things like the steam link.