Jim, is that not already possible? FAR 61.4(c) provides for blanket approval of simulating devices. That's how a PCATD (personal computer airplane training device) is "approved" and can be used in some cases to to reduce the flight time required for a certificate or rating.

Of course, one requirement for using a flight simulator, FTD or PCATD is that an authorized instructor be present and conducting training. Even then, what can be logged or credited is somewhat limited but this is all the local flight school can do with it's simulator.

Perhaps you are suggesting a device that can be used to log time beyond what is currently authorized?