Google will reportedly be launching a special app store just for Google Glass apps in 2014.
Buried in a seven-page New York Times report from Friday, NYTimes.com revealed that one will come as the device becomes available to consumers. Here's the relevant excerpt:
Because there isn’t an app store for Glass, its capabilities were initially limited by the few applications preinstalled by Google — sending and receiving texts, taking and sending videos and pictures, getting directions and doing Google searches. (The company says an app store is coming next year, when Glass is available to the general public.) Google created a set of guidelines for designing applications, and by midsummer, private developers had produced a few offerings. A cooking application, for example, displays pictures to go with a recipe as you make it. “It’s like a little chef alongside you, telling you what to do,” says Gary Gonzalez, a petty officer in the Coast Guard who was chosen among the 8,000.
The Glass-dedicated app marketplace has since been confirmed by Matt McGee at MarketingLand, who writes that Google declined to share any further details, like even if it will be part of Google Play or completely separate. It stands to reason that this would be at least connected to Google Play, but I guess time will tell.
Google will likely want a place that easily displays all Google Glass has to offer as people can buy it, so it makes sense to separate it out, even if it's not completely separate from Google Play.
In the meantime, you can take a look at this unofficial list of Glass apps from glass-apps.org.