[kijin]

The requirement can be easily bypassed by going bankrupt before the required time is up. You will soon hear advice like "if you want to get in to the IoT space, create a new C Corp for each iteration of your product..."

Whatever you require them to disclose after X years, it must be escrowed with a trusted third party in advance.

[JoshTriplett]

Agreed: any kind of future disclosure requirement should be backed up by a source code escrow requirement.