[kolinko]

That's why smart contracts will be really lousy for things that traditional contracts are used for.

But on the other hand, there are some simple - yet important - things that can be implemented in smart contracts pretty easily. Say, futures, or stock options, or certain kinds of insurance. For these things smart contracts are great because they offer extremely cheap enforceability and speed.

This is a textbook blue ocean, or innovator's dilemma. The new tech is much worse than the old one in some cases (enforcing intent), but far better in some other ones (speed, enforceability, global access)