Well I must admit that I have fallen in love with this app.
At the first time itself when I downloaded Google Earth I searched for The Taj Mahal and to my astonishment the views were amazing(I’am uploading search result).
Well than what I just browsed through various locations including Burj Al Arab and Burj Khalifa and also my home location.
Well talking about usefulness, you can use it to get directions as on google maps .
Just go on and see various places from sky in 3D and 2D views, its just Amazing as Isaid earlier.