Speaking as someone who has stuff in Google Play - perhaps. But it may also make it easier for someone with a great idea but not a lot of programming experience able to get something out that outweigh having to index a number of low quality apps. Given the filtering mechanisms on both stores that are in place, I'd be less worried about getting a lot more "bad" apps than making it easier for good apps to get noticed - a current problem that likely won't be affected one way or the other by this.