It seems like it's a localization string identifier, which means it probably stands for a tangible product, and it seems strange that a developer would randomly add and commit that change.
I'm going to guess that it was a mis-merge in the App Store codebase and that Lion will be able to run iOS apps (using the MacBook touchpad or Magic Trackpad for multitouch). I mean, Snow Leopard already runs iOS apps pretty much natively if you have the SDK installed.