That's sort of my reasoning for pre-ordering one as my PS5 lives upstairs in the study/office.I've preordered the Portal - it's got a lot of hate, but I'll use it a lot for playing in different rooms/garden or if the missus is watching TV or playing PS4/Switch. I like that it's self-contained with PS5 controller built in, rather than faffing with a mobile and seperate pad.
A Vita 2 would have been nicer, but that's never gonna happen!
Once my daughter goes to bed, my wife and I tend to hang about on the sofa and I'm not overly interested in TV shows outside of a few per year (Ted Lasso, Shrinking etc.) so I tend to watch junk on my iPad or I go upstairs and play games for a few hours. The Portal means I can spend the evening on the sofa with my wife still but happily crack away at some games.