The Layout is also a very tricky part. On iOS the app is always in full screen. On OS X, there are infinite number of display sizes and the user can dynamically change the size and ratio of the window of your app.
Apple are pushing both iOS and Mac developers to use autolayout (especially on the iOS side), which is meant to solve some of these problems.
I say 'meant to' because autolayout is far from perfect, but there's a pretty clear shift on the iOS side from a "code to a fixed 320x480 window" to a "write a UI that can adapt to different sizes gracefully". For example, apps should in iOS 7 really now be able to handle varying text sizes (and thus layout) according to user preference.
Spec bump updates rarely make waves at Apple. Part of Apple's retail strategy is avoiding the spec rat race, so it doesn't make sense for them to draw too much attention to spec updates.
I expect it'll focus on a single product line, possibly with some updates on how the company's faring, particularly the iPhone 5s & 5c's launches.
I'd guess it'll be the iPad's turn in the spotlight, though it's possible Cupertino's decided it's time to fully launch the new Mac Pro.
(And with a zero probability: the return of the 17" MBP, much as I'd love to see that size rejoin the rest of the family - ideally with a 3840x2400 display, but the last version's 1920x1200 would be fine too)
While deleting your account is certainly one of the options, I disabled all email notifications and removed all the recruiters that added me. Now I am careful about which requests I approve. Overall, LikedIn can be useful for connecting to new colleagues or former ones.
One of my clients wanted me to implement the same thing for his iOS app. I told him, that I think it is illegal and if it is not, that it should be. Anyway, I never wrote that code.
I am really interested in the whole "smart glasses" idea and Google's implementation. What I am concerned about are all those cellular/radio antennas strapped to your head and how do they affect a person's health. I have not found any discussions about this topic yet.