I know that this thread was intended to ask about which devices might get iOS 7...but, I saw some rendering of it last night. I'm not sure about the way it "might" look with the white and black theme. The removal of gloss finish to the apps to make it look more "flat" is to me somewhat boring and reminds me of what I had on my droid phone. I hope it doesn't look so drab like the rumors are suggesting it to be.
From the rumours I've heard, the software will look more elegant and modern than just bland/soulless. Watch some Jony Ive interviews on YouTube to get an idea of his design philosophy concerning hardware. I think he'll take a similar approach with iOS 7. He has previously stated that he aims to "unify" hardware and software with the look of 7.
It's easy to overestimate the importance of this, but the recently released WWDC app has a noticeably different look to previous versions of iOS, which many have interpreted to be a preview of iOS 7's UI.
This looks very nice in my opinion.
In terms of features, I look forward to an updated Maps application, which, interestingly, is rumoured to have a "street view-like" feature, and more advanced data.
The iPad 2 is definitely getting it, just read that on CNet.
32GB Wifi iPad 2 / OS 7.0
seems to me they rushed with the release of a new version