I personally love the new back. It's looking like it'll be similar or same material as the Nexus 7, which is great. It feels good in the hand, gives you some grip, gives you a sense of durability, looks subtle, and feels/looks better than both glossy plastic and glass, IMO.
I'm all for this material. What is it exactly, anyway?
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Yeah, I really wish iOS brought more to the table. I'd love to go back to a Nexus 5 and iPad Mini Retina combo. Best of both worlds. I've always thought iOS was far more forgiving to use on a tablet because I just don't have to do as much on it -- it's mostly for media, browsing, some reading, and gaming. In those instances, I don't need the keyboard to be killer good. It's not like I'm drumming out long important emails.
Yet still, many frustrations switching between an Android device to an iOS device -- loss of back button, loss of dedicated menu button, loss of swiping for the few times you do need to type, loss of widgets, etc. It's like driving an automatic then going back to a manual car.
Oh well. It'll either be my HTC One and Nexus 7 combo for the foreseeable future, or a Nexus 5 and Nexus 7 combo. We'll see what happens with iOS 8...