I'll admit the "optimal" couch mouse-and-keyboard setup has yet to be found. Eventually you just end up using a whole bunch of different control methods for various games.
Personally I'm fine with a wireless MKB that I sit on top of a simple wooden board in my lap. I haven't really noticed any bad input lag, but I should add I almost never play multiplayer games. I also no longer sit 15 feet away from a video game I'm playing whether it's PC or console, but maybe I'd feel different if it was like a 70" screen. There are some companies that offer basically fancier versions of what I'm doing. My issue is I'd want a mechanical wireless full keyboard, and right now there seems to be only one that costs like $200. Couch MKB just isn't something a lot of people are focusing on right now. The Steam controller is a really nice step forward. However, if you actually do figure out a couch MKB solution, then there remain only very specific instances where the Steam controller is superior to both that and an Xbox controller. Witcher 3 is one example for me -- it's a 3rd person action game so it feels more comfortable for me on a controller, but navigating menus and certain things is improved with the mouse cursor. The Steam Controller is certainly best if you absolutely can't figure out a couch MKB solution for your particular setup.
I still wish Microsoft would Windows itself or at least the app/game launcher more compatible with the Xbox pad.
In any case with my current setup I can fairly quickly power up a computer, sit the MKB in my lap, log in, and start up a game. Probably still takes a few seconds longer than powering up a PS4 and starting a game, but it's not significant enough to be a problem.
Personally I'm fine with a wireless MKB that I sit on top of a simple wooden board in my lap. I haven't really noticed any bad input lag, but I should add I almost never play multiplayer games. I also no longer sit 15 feet away from a video game I'm playing whether it's PC or console, but maybe I'd feel different if it was like a 70" screen. There are some companies that offer basically fancier versions of what I'm doing. My issue is I'd want a mechanical wireless full keyboard, and right now there seems to be only one that costs like $200. Couch MKB just isn't something a lot of people are focusing on right now. The Steam controller is a really nice step forward. However, if you actually do figure out a couch MKB solution, then there remain only very specific instances where the Steam controller is superior to both that and an Xbox controller. Witcher 3 is one example for me -- it's a 3rd person action game so it feels more comfortable for me on a controller, but navigating menus and certain things is improved with the mouse cursor. The Steam Controller is certainly best if you absolutely can't figure out a couch MKB solution for your particular setup.
I still wish Microsoft would Windows itself or at least the app/game launcher more compatible with the Xbox pad.
In any case with my current setup I can fairly quickly power up a computer, sit the MKB in my lap, log in, and start up a game. Probably still takes a few seconds longer than powering up a PS4 and starting a game, but it's not significant enough to be a problem.