I dunno... Continuity, answering phones on a PC, etc, seems to point pretty strongly at "we are going to make switching between all our devices as seamless as possible" for "what they plan to do next".
That's not really "optimizing", considering that Apple is aiming at a range of improvements to the cross-device experience that other companies have only barely touched at (Chrome tab sync, etc).
This is especially true because introducing any new 'smart' (=connected) products into your life if you already have computer, smartphone and tablet, is going to be just too much if the issues about being in synch haven't been solved until then. Apple has the right ideas about pushing in this direction - as for me I've essentially given up on trying to keep everything both synched and available for any use case. The main thing Apple's fall updates won't offer that I'd really like is multi-user for iPads. If it weren't for that, iOS 8 / OSX 10.10 are - on paper - pretty close to where I'd want everything to be. That being said, it probably won't solve Apple's software QA issues I've been experiencing lately.
For anyone paying attention, the SDK has been specifically modified to allow for:
1) Smaller satellite devices for iPhone (iWatch? I don't know, but something like it. Look for it in the Continuity & notification widget APIs).
2) More varied size devices (higher resolution iPhone? Look for it in the Xcode size "traits" APIs).
3) A hint that Macs may move to ARM in the next couple of years (look for it in the way they're rolling out new graphics APIs like Metal).
4) Apple TV may be getting native apps connected to your iPhone/iPad apps (look for it in the new Extensions APIs).
While none of the above are hard promises about where Apple's going, they pretty much have no choice than spill this out in the open, as they need to release the SDK and prepare devs for the changes at least some time ahead.
It seems their new strategy is to release software/SDK updates in preparation for new hardware in June during WWDC, then we have a few months padding until developers get their air back, and... starting August/September the new hardware starts coming, just in time for school, and just in time for the winter holiday season.
That's not really "optimizing", considering that Apple is aiming at a range of improvements to the cross-device experience that other companies have only barely touched at (Chrome tab sync, etc).