With Google Glass expected to hit the big time in 2014, Google wants to make sure that there are enough apps to support the connected specs. We all know what happens to a new mobile device these days, if there is not enough merchandise in the app store. Still, Google Glass is such a different device that it probably could survive a less than fully stocked app store, at least when it is first launched. It really doesn't matter because the XE10 update will probably insure that there will be enough apps for the specs anyway.
source: Geek via Phandroid