A few open source developers isn't going to make much difference.
It's causing problems for open source developers who like to be able to do what they want, but for end users I don't see any problems. Apart from the quality control - why are there so many useless mindless apps like "flashlight"?
Personally I'll mainly still continue to use webapps rather than the apps.
Also fuckingnda.com is a good was of expressing that and bringing together twitter.