It is. I use it as such regularly. Keyboard+mouse+screen = browsing firefox as usual. Works quite well. Libreoffice, okular, signal desktop… I’ve used worse computers in recent years, steamdeck desktop experience is better than many 4 to 5 year old cheap laptops with win10 or win11.
Played A short hike yesterday and it was great. Short indeed, but very casual, nice and relaxing.