something I'd like to see from google maps would be something that bing did, and apple also have the "birds eye" or "fly over" its a much closer/ clearer view and from 4 angles.
Something else, being that google maps is also browser based, incorporate something similar to another one of bing maps features, the ability to measure distance. On bing you can either place to points and it will find the distance, or you can draw a path and it will add up the distance.. that is something I really believe that google is missing in their maps.
One last thing again from Bing.. when I right click a house an address comes up, though its not the right address all the time, I think google could improve on this by getting the addresses correct.
If they added these features it would be even better, and Google Maps would be my hands down favorite maps to go to.