As a new market entrant, Android is going to need all the help it can get to spur adoption. One of the biggest issues facing the mobile industry is the discovery process of finding new content and applications for phones. Network operators have attempted to combat this with centralized stores where content can be purchased (think Verizon Wireless' Get It Now).
If Android phones can have access to a store where applications can easily be found, this will be a big boost for the platform. It will take away some of the fear that early adopters might feel about switching to the unproven operating system.
But Rubin made other comments that are noteworthy. The very nature of Android's open model and Apache license means that OEMs, software developers, and even network operators can tweak the APIs of the Android handset and vastly change the functionality of the phone. "They can add to it. They can remove from it. They make it their own. They can rip out all the Google stuff and put in all Yahoo stuff."
Herein lies what is perhaps Android's greatest strength and greatest weakness.