With iOS 8 and OS X 10.10 Yosemite set to bring a new level of convergence between Mobile OS's and Desktop OS's with two new features in both iOS and OS X 10.10 that Apple calls Continuity and Hand-Off.
Continuity basically brings over the flat look that was introduced in iOS 7 and partially implemented in OS X 10.9 Mavericks, the new look of OS X 10.10 also brings a new flat widow controls theme along with a new Notification Centre that has a Today tab like that of the Notification Centre in iOS 8 along with Widgets and a Notifications tab. In the iOS 8 Notification Centre gone is the Missed Notifications tab & the All Notifications tab has been replaced by the Notifications tab.
|New Flat Theme in OS X 10.10 Yosemite|
|New iOS 8 Notification Centre.|
Hand-Off basically allows you to start doing something like write an Email on your iOS device and continue working on it on your Mac (this feature is only handy if you own both an iOS Device and a Mac, or quite possibly multiple iOS Devices), another good Hand-Off feature is the ability to use your Mac to receive phone calls or SMS Messages while your phone is on charge or in a different room.
Conclusionif features like Continuity and Hand-Off are done correctly without changing the original Desktop OS too much then it's only a good thing for Computing and Smartphones, but if it's done wrong then it is a bad thing.
I'd like to see something like what Apple is doing with Hand-Off done by Microsoft on both Windows and Windows Phone, along with Google with Chrome OS and Android.