Yosemite is best characterized as the continued coming together between iOS and OS X. The lessons we learn from mobile operating systems are helping us all to better realize things we’d like to do on our devices that have tactile keyboards and vice versa. For example, list apps like Wunderlist are driving simplistic and focused interfaces that sync with 3rd party cloud services, rather than people using slightly more complicated apps for the same tasks. And some of these technologies are starting to make it into the operating system so you don’t even have to buy an app to get them to work!