Yeah basically, they will work as a display without much effort. There is a phone app but I don't really use it. I have the xreal glasses and love them.
There's a bunch of these xr glasses that are just a display and a gyro, no cameras, no Wi-Fi, no phoning home. I'd go with Viture at this point, XReal has been super shitty about working with third parties, Viture has a Linux sdk. Look for a sale, maybe Black Friday. If you buy a pair for $400 you'll probably be disappointed. $100-200, maybe more reasonable.