I had a friend who had just bought a high end Nokia. We arranged to meet for lunch. She got hopelessly lost because Nokia's GPS and mapping were crap.
Apple's just worked. Same with the App Store.
I'd guess this is going to have some kind of VApp Store. But I suspect what it really needs is plain old MacOS running everything as usual, with slightly customised support for virtual displays.
I still remember when the only option for GPS directions was buying a dedicated Garmin, or paying your cell carrier for an extremely crappy and very expensive service that was hard to use because phone screens were too small. Everyone I knew used printed map quest for directions.
GPS being standard on smart phones is just so flipping good compared to what we had before and am positive is still the killer app that pushes people to get smart phones.
This make astonishing growth in Google Maps.
Google tracks your location so that they can track ad conversions based on store-visits (no I'm not kidding).