Staying with the Shift
In the last decade or so, there's been a major shift in computing from the desktop to mobile devices, particularly tablets and phones. I was working with Blackberries when we started trying to push IBM Notes data through them and I moved onto the iPhones for versions 4-6. I can't say I was particularly happy being locked into their itunes based ecosystem and I jumped to Android as soon as I possibly could.
We started building web-interfaces designed to fit mobile screens for our web sites until the resolution changes started going crazy and we discovered bootstrap. From then on everything became "responsive design" and that's where we are today.