I've had my Steam Deck for about 2 months now and I must say it's met my high expectations. After using it only as mobile console/laptop a week ago I finally bought a dock and the way it now acts as the living room couch console (with my entire Steam, GOG etc libraries) but also supports desktop applications, desktop mode, keyboard and mouse is sublime. Wanna stop playing and watch some videos? Sure, here's your actual desktop browser with your extensions like adblock so that you can watch them in peace. Wanna use a search function? You can just type on a keyboard instead of clicking through a virtual one with arrows for an hour.
And of course it doesn't try to force you to use a single vendor-controlled overpriced games store or buy some shitty, way overpriced controller that feels like a chinese knock-off of an actual controller (*cough* Switch *cough*), it's the first console, I think ever, that's actually yours, letting you freely choose the hardware and software you want to play with.
It's a total game changer, a chemotherapy for the console market's cancer. I love it.