https://www.youtube.com/watch?v=voUTT4LA5hs
simple demonstration of a brilliant solution hasselblad has had for years and nobody seems to be able to implement... hasselblad has it and nobody else can come up with a simple and real working jpeg over wifi solution....
Errr... Phase One's lineup has had this feature for 5 years and Leaf (now part of Team Phase One) had it 14 years ago!
This functionality has been in the Phase One line up (IQ2 and IQ3 series) since it shipped the IQ2 series June 2013. As a bonus it provides (optional) native
https://www.youtube.com/watch?v=tIgzpKc7Mds using the GPS polling from the iOS device.
If you want to go back in time further the Leaf Valeo 17wi and Leaf Valeo 22wi had built-in bluetooth based wireless which provided much of the same functionality. This was in 2004, so it was only on an HP iPaq (not iPad; just spelled similarly) and the speed and overall responsiveness was nowhere close to what we have today with the iOS solution on the Phase One IQ2/IQ3, but you have to give them credit for having this 14 years ago!
Neither Capture Pilot, nor the X1D solution (or the Leaf solution before it) are really "tethering wirelessly" so much as they are allowing someone on an iOS device to "dial in" to the images stored/hosted on the camera. Still very powerful, but more of a supplement than a replacement for tethering in traditional tethering situations. In situations where tethering is impractical it provides some (but not all) of the workflow/features of tethering.
The simple answer to why you don't see this on every kind of camera is that you need a native (integrated directly into the camera) solution for wifi to work really well. To do a native built-in end-to-end wifi solution you need a camera company that is obsessively good with both hardware
and software. Most (nearly all?) camera companies are simply awful at software and don't invest in software because it's not a direct revenue generator for them. Phase One has a very large and talented software team, funded by small-format camera users paying for Capture One Pro.
See also:
https://dtdch.com/phase-one-iq250-11-things-to-know/