Honestly, the utility of 3D maps is way overblown. Even satellite map tiles are too- way too much extra, unimportant information.
A picture (tile) is worth at 1,000 words indeed.
I've often used the satellite/hybrid view to help orient myself in unfamiliar cities or areas by finding reference points (coloured buildings, obvious statues or landmarks etc)...
If you just want to know that a given address is on street X between avenues 4 and 5, then sure, but that's not the only use for a Maps app..
They're great for geocaching though.