I would be afraid of Google or any other big company acquiring it since it would result in locking down of the system to satisfy the lawyers. I remember when certain Little Big Planet levels were not allowed to be distributed because they contained copyrighted materials: http://www.1up.com/news/big-planet-levels-deleted-due
I want the freedom to load any content from anywhere I want.
On the other, hasn't Google been very good with making sure their Android devices (e.g. Nexus *) are pretty open? That was my impression.
Of course, I don't follow this super closely. Moreover, all this is relative--and relative to Apple, even Microsoft seems open. So Google has a rather large spectrum of openness where people would think them open just in comparison to Apple and Microsoft.
I want the freedom to load any content from anywhere I want.