At least with the Quest, the video quality over cable was only slightly better than wireless. The heat and weight of the extra hardware also becomes noticeable when sitting for a while.
For example, there's no way I could do an 8 hour work day inside a Quest - but I imagine a cool lightweight bigscreen beyond would be fine.
I used to love shooting games in my G2, I got the Quest and, despite having a similar resolution, I could hardly make out distant targets whether wired or not. It entirely killed VR for me and I haven't used it in over 6 months.
For anyone interested, in the Tested video he states that you can use it plugged in but you will only be able to use it this way uninterrupted while streaming, because using the Frame itself will use up the battery faster than the rate at which it charges
The USB-C port for charging is on the battery itself; their store diagram doesn't show if the battery itself can be disconnected for power passthrough.
you could... just plug it in? unless the frame cannot be used while charging, but i haven't seen anyone claim that.