The above chart shows how far Street View* has gone, compared to its so-called "competition" EveryScape**, MapJack, and StreetSide.
This chart shows how fast Street View is updating, compared to its "competition".
Google has absolutely nothing to worry about. At this rate, the number of locations by 2015:
Street View - 574 locations
EveryScape - 542 locations
MapJack - 105 locations
StreetSide - 2 locations
*Not including the areas without camera icons.
**Based on main page listings.