I wonder about this actually... Thinking of how our parents or grandparents might be able to use a computer just fine but they can't find their way around a fl

I wonder about this actually... Thinking of how our parents or grandparents might be able to use a computer just fine but they can't find their way around a flat mobile UI -- Is the Snapchat UI just a new paradigm that we old people don't get? 10 years from now, will this kind of UI design be pervasive? What if UIs are evolving and we're being left behind?