It will be great if you see your house from satellite or from helicopter 500 ft above. But it will also be great if you do it just now on your PC or on your mobile.
It can be used to find an address on the go or calculate the time/distance to reach a particular place .
And all this is, off course, free of cost
Download Google earth
It can also be done on your web browser without software using these sites
http://maps.yahoo.com/
http://maps.google.com/
On these websites you can toggle between map view or satellite view. But these lacks some of the great features of software Google earth.
