Being iPhone only didn't stop Instagram from launching, getting huge, and branching out to other platforms. If this allows you to make a quicker prototype, it's a big deal.
The only downside to this wild success is that profit is a lot more concentrated than it used to be. It's really hard to bust onto the charts as an outsider when there's so many incumbents.
For example, sucks to be someone who launched a game this week when Monument Valley 2 took over everything.
