The industry is in it's infancy still but progress is starting to reduce the very high price for this unproven technology.
Assa-Abloy, the world's largest manufacturer of security locking products, including (the recently bumped and picked) Medeco and Mul-t-lock product lines, already introduced the Cliq product line to consumers.
Here is one reason why the technology is still infantile...
Obviously, it helps to have an existing key, but as such, it is not necessary as without a battery, the lock relies on a mechanical component that is easily defeated, as shown above.
On a $ for $ value proposition, Bilock is unbeatable in aesthetics, price and cross-hardware use.