As of January 28, 2010, There is now a new New Google Earth Imagery that is running over the Google earth, We have below sample of images taken from the new Google earth,  All of the regions have been improved, You can check it out through the Google earth page. Google Maps are usually not really that well defined, but these new images shows new picture of taken from the satellite of google.

Here are some of the regions and maps given with the improvements
# India: Bhopal (thanks ‘Alok’)
* New Zealand: Much of central-north Canterbury including Lyttelton, Rolleston, Rangiora, Amberly, Woodend, Darfield, Burnham – but excluding Christchurch (thanks ‘railfan990′)
* Mauritius: About 75% of the island was updated (thanks ‘Thierry’)
* Romania: Targu Mures (thanks ‘Cristian’)
* Russia: Part of Moscow (thanks ‘RiderLT’)
* United Kingdom: Large part of West Yorkshire, and some of North Yorkshire. Leeds/Bradford/Keighley/Skipton (thanks ‘Jimmy_Lemon’)

* United States: Cape Canaveral, FL (thanks ‘Munden’), parts of California and Arizona (thanks ‘Steven’)
* Venezuela: Barcelona (thanks ‘Snakeye’)