Google buys Keyhole Interactive World Maps
For just $30 a year for a consumer, or $600 a year for commercial users, you can use Keyhole, an interactive mapping solution that gives you zoomable high definition images of the earth. I can see where a realtor for example, may benefit from being able to show a site to a prospective buyer. I can see an attorney using it to research the scene of an incident, etc. I think it may be a bit pricey for most, but it does have a free seven day trial. Many cities are in very high resolution, such as Boston in this example.