Getting the service into other primary markets such as the UK would be a great start. They're really dragging their heels on this, it's a shame they don't invest a similar priority into their customers overseas.
Yes, one with a tiny amount of market penetration. Sure, there conversion rate for said service is impressive, but most of the customers are likely fans of Dr Dre & the expensive yet cheaply designed headphones that they offer.
My iPhone 4s is chugging along nicely, although I suspect iOS 8 will make it lag just like iOS 7 did for the iPhone 4.
Looking forward to the iPhone 6, but hope the size doesn't increase or that they at least offer a sibling 4" or smaller device for those of us that appreciate real single handed operation.