I don't get this. There is no live demo so far, only a pre-rendered ad. So you have no idea what the actual experience will be like (in an industry famed for over-promising and under-delivering; remember Magic Leap?). The use-cases are also dubious: you can... watch TV alone? Scroll through photos alone? Take pictures? Only the virtual desktop thing was something that I thought "that's useful".
I'm unimpressed so far, maybe that will change maybe it won't. But right now I don't see anything worth being impressed by.
They gave 30 min demos to WWDC attendees the following day.
I'm excited mainly for two reasons: fantastic eye and hand tracking (according to reviewers such as MKBHD) and replicating my office/entertainment setup wherever I am (except for shared experiences, that is).
I think Apple tried to nail the seamlessness of the experience, rather than give you some amazing use case nobody ever thought of. That will be a good challenge for developers.
I'm unimpressed so far, maybe that will change maybe it won't. But right now I don't see anything worth being impressed by.