There are really two main benefits from having a console over a computer.
1. Exclusives. This is pretty much a no-brainer and why Nintendo and to an extent the PS4 are still relevant. This is kind of self-explanatory so yeah.
2. Local Multiplayer. I dunno about anyone else, but having local multiplayer over online multiplayer is so much more fun and engaging, especially when you're playing games like Smash or Co-op games like 3D Land. I honestly can't say I've had the same local experience on a PC game, and there is a massive difference to the point where I think it makes a noticeable effect on purchases.
After that, there's really no other reason to have a console over a gaming laptop. If you move around a lot, maybe consoles might be better if you can't have a heavy laptop or a desktop computer. But that's really it.
speaking of annual cash grabs, 2017 looks like a great year for sonic. sonic mania looks exactly like the sega genesis games which to this day are my favorite 2D platformers. the other one looks pretty good too, basically a sequel to sonic generations which was a ton of fun.
I hate Sonic games, so I can't relate.