The two main points Adam made were:
(1) You can see blocks of addresses, notice in the embed map below around Baruch College, that there are numbers on the streets that show you the house numbers. So if you need to go to 153 East 25th street, you know where to go. Zoom in to see:
(2) Roof top markers, so you now which building you are looking for. Zoom in to see:
(4) Easier getting updates and sending update due to their shared data agreement.
Finally, you can submit feedback about the data to mapinsight.teleatlas.com/.
Forum discussion at Google Maps Help.