[dapak]

"For bonus points it would also check Google Maps and compare how green my lawn is to my neighbors"

How's that going to work when the imagery isn't real time?

[cbhl]

Alternatively, it could check what neighbours' sprinkler systems are set to, and recommend the median or mean (or maybe just the max of immediately adjacent neighbours).

He's just making a wishlist of features; the particular method of implementation doesn't have to match.