I don't know if I understood your idea correctly but there is something called as slock.it which runs on blockchain and they have good IOt projects.A simple remotely controlled lock for example.Right now they haven't based bitcoins as their primary methods but yeah the underlying idea is still the same IE blockchain.
Slock.it is a pipe dream and will never work.
Who the hell would ever install a remote lock that requires ether to unlock it? You certianly wouldnt for a personal home lock, and no hotel would ever rent to an anonymous meth producer.