Here the bad news for folks waiting on the Recon Jet. The $500 Android-based heads-up-display — think of it in the same family of wearables as Google Glass — will miss its expected launch in December.

Recon Instruments co-founder and CEO Dan Eisenhardt in a blog post and email to those who preordered over the weekend announced that "certain aspects of the latest prototype fell short of my expectations, so some redesign will be required." Eisenhardt notes that they have "mapped a clear path to resolving each of the option issues," but "the bad news is the time necessary to execute the re-design will delay first shipments by a few months."