Google Streetview (with a time dimension)

Hearing that Greece opted out of Google Streetview, I decided to take a virtual tour of Italy. Strolling down the streets of Milano reminds me of my trip there 6 years ago.
Aside from nostalgia, I came to realize that Google Streetview could be used to present a 4th dimension, Time. How cool it would have been if I can render a time-lapse animation of the Streetview  from 2003 to 2009, see all the small/big changes, experiencing different seasons at the same the location.
Technically, it adds 3 challenges:
1) The central of the camera array needs to be aligned across all different trips that the Google car took during the years.
2) The image dataset will grow at least linearly overtime, even if Google just want to cover the locations that they already covered today. With their ever increasing reaching, the dataset will grow much faster.
3) Economically, the cost of driving around all these street every 3 month is hard to justify by the free web traffic Google Streetview generates. So the business might not like the idea.

Still, even if Google only covers a few landmarks, e.g. Eiffel Tower, Rome Colloseum, Duomo Cathedral, Kaminarimon (雷门) over time, it would make quite an impressive application.