Earlier quoted context omitted.
Agreed, the current implementation is unlikely to work where it matters - in dense areas. Now if they'd find a way to couple this to realtime satellite data...
If any company had realtime satellite data over even a handful of major metropolitan areas there would be a lot better uses for that data than finding open parking spaces.
I wonder what the barrier is here, as the data very likely exists. The usual terrorist fears? Privacy?
Or is satellite coverage still an "wait a day to get updated image"-affair?