From this article in the New York Times:

“Courts should be skeptical going forward when the government claims it has no other option besides compelling a device maker’s assistance,” said Riana Pfefferkorn, a cryptography fellow at the Stanford Center for Internet and Society.

“Now that the F.B.I. has accessed this iPhone, it should disclose the method for doing so to Apple,” she added. “Apple ought to have the chance to fix that security issue, which likely affects many other iPhones.”

The FBI is faced with a choice between making iPhones safer from hackers or keeping a cracking technique to themselves that they know is in the wild.

Which side will they choose? We’ll know soon enough.