The iPad will not interfere with the deployment of the airbag. The airbag will deploy and the iPad will be accelerated at the driver's face, at about 50 ft/sec. Ideally, this will occur before the driver has reproduced.

Videx is popular in hospitals for high-abuse keys (like Code Blue keys for elevator overrides) and for remote gate keys in places such as airports or nuclear plant where loss of a key would have tremendous implications unless you can make sure the key will expire in a short period of time or can be quickly override.

The cost is high, IIRC around $400/cylinder, and the keys aren't cheap. However, I find the idea clever and it's nice to have a system you can just do drop-in installations for.

Unfortunately, it doesn't seem to fit your requirements.