[jameslk]

> does anyone see a market for a $700 license plate with a yearly subscription model, which also requires you to carry a backup non-digital license plate?

No, but I could see one subsidized or mandated by governments (e.g. if it makes tracking vehicles much easier due to GPS / RFID / Cell Antenna)

[beerlord]

Particularly when electric vehicles are more widely adopted, and gas tax revenue falls. Road use can be directly taxed, with time of day usage too, which should allow far more efficient road usage.