Determining if VR use by QBs definitely improves their play is a high priority. Calling VR a ‘game changer' before it's gotten into the pro football game is premature as were the original hype of being the next big mainstream tech thing decades ago.
Introducing a tech-driven means to improve some aspects of the NFL takes time and needs to be embraced by "old school" coaches, but it can be done. Who expected to see tablets computers used on the sidelines during games to review plays using video?