I have the same fears as you, but maybe a little less because I really don't think Google's interested in the hardware business as such. The reason they started down the android road in the first place was so they wouldn't get locked out of the mobile market in the venue they actually care about: search (specifically, search ads). Doing anything "evil" in this case just doesn't seem to jive with their long-term incentive to commoditize mobile software and hardware.