Like I said, not as clean as the meta quest, but not that different from the apple vision:
I believe the strap part would be easily solved TBH.
The thing about this solution is price. Streaming from the tablet to the HMD would require a lot of processing power inside the HMD itself. We would have 4 cameras on the HMD for tracking, and if you go wireless, now you need an SoC inside the headset that's capable of processing the data coming from the cameras to resolve the positional tracking. They're not going to send that camera data through Wi-Fi to the tablet so it can do all the processing and then return the information required...
And, of course, you'll need a small storage, RAM, battery, and Wi-Fi on the HMD. At this point it basically becomes a standalone device, defeating my proposition of it being cheap.
Well, to me it seems a good tradeoff, offering something that's between a poor LABO offer and a expensive "Nintendo Quest" using an SoC (and all the other components) inside the HMD. But hey, I can see why some people wouldn't like it at all.