Thank you!! I thought I was the only one to like the glossy, vibrant look of the apps on the home page. It really makes the iOS stand out from the rest with its appearance. I guess we will have to wait. If they are adding that black and white theme, I hope there is some customization options that we can do to spiff it up a little.
I am fairly satisfied with the look of iOS, but I think that it's time for a UI overhaul, as some apps, such as Notes, are starting to look somewhat outdated, and there are some noticeable UI inconsistencies, particularly in iOS 6. Also, Apple has been criticised for "playing it safe" with recent iOS updates, so it'd only be beneficial for them to make a bold change with iOS 7.
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.
Screenshot:
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.