I contacted Wolfbox support a while back about a G930 (10" mirror that comes with a 4K front camera and 1080p rear camera) using the higher quality G900 (2.5K) rear camera, and was told that the mirror would not support it. It would still only display/record in 1080p. So it seems like it is a limitation of the DVR software and/or hardware in the mirror.
What I want to see is the same 4K camera with the updated Starvis sensor used in the front, also used in the back.
And I'd really like to see it offer in the 10" mirror as well as the 12", as I think it is really more appropriately sized for most vehicles. 10" is even boarding on too large for use in my Soft Top Defender..
As for WiFi, I personally prefer NOT to have that feature. I like my truck to be as basic and analog as possible, with ZERO ability to have an outside entity connect to any of it. Voice command isn't really of interest to me either. I just want to have good documentation of what happened if I end up in a bad situation of any kind. IMHO, it is unfortunate they spend money developing 'features' to attract buyers, instead of just using it to develop the very best video recordings (front and rear)..