You’ll get a lot of people recommending the Nintendo Switch and I agree that it offers the thing that’s most different from the PC. It’s portable and its library will be somewhat exclusive because Nintendo doesn’t make games for anything else (other than your phone… and the 3DS). The thing that concerns me in your post is that you say you see “mostly arcade games” for it. While I think that’s selling the lineup short, the Switch library is likely to emphasize action games. Maybe that won’t be for you?
PS4 and Xbox One are largely similar machines with similar games. The big third party stuff you can already play on your PC is playable there too. PS4 has a larger installed base of gamers so it’s easier to find players online if you enjoy online play, especially in more niche titles that appear on both. Microsoft has a couple of excellent exclusives if you want a really great driving game (Forza) or you love Halo (which we do at my house). Microsoft does seem interested in letting you play almost everything on either Xbox or PC though, so frankly, I don’t think the value is there for someone who wants to add to their possibilities. All it really does is give you an affordable option to play PC-like games and your back catalog of Xbox 360 games on the TV. PS4 at least offers exclusives, the possibility of VR with an additional purchase, and better in game performance on the standard box. If you really want to go “Pro” then Xbox One X has more power, but also has that game catalog issue where there isn’t much that’s exclusive to sell it and a good PC will still be on par.
For PC gamers, I think the Switch is the best console option if they want unique experiences for console gaming to supplement their PC gaming. If you just want to move your PC gaming to your TV, either hook up a PC to your TV and get an Xbox 360 wireless dongle and four controllers or go for the PS4 at the low end and an Xbox One X at the high.
That’s not even getting into same room multiplayer, where I think Nintendo always offers a lot more for people to enjoy starting first and foremost with Mario Kart 8 Deluxe. The next best option there is also the PC with that 360 dongle setup tbh.