Personally I find current VR already at the mind-blowing level, although I agree there are some things which definitely need improvement. However for me FOV never has been an issue, I barely notice lack of peripheral vision.

The main issue I see is relatively low resolution - with normal monitors you have at least 1920x1080 covering small percentage of your view; with VR there's half of that covering whole view. Increasing FOV without providing better resolution will only make it worse.

This can be especially noticeable in games with large distances (like ETS2) and games with small text size. For those I'd definitely like to see a headset with at least 4k resolution.