I’m sure the ability to watch all cameras on one screen has been suggested, but I would also like to suggest that in addition to a “Live View” mode we also have a “Monitor” mode.
In monitor mode, the camera would not be recording unless there was activity (and perhaps that could also be a toggle - to not record even if there was activity in the case of busy locations).
I want to be able to watch all of my cameras on an active screen all the time from my bedroom and office but don’t necessarily need these streams recorded, and I certainly want the timeout to be longer than 10 minutes – in fact, in monitor mode, let it run until I turn it off for wired cameras, perhaps hours at a time for battery powered cameras.