iOS did something a little similar through iOS6, with folders having a kind of visual physicality—tapping a folder would "slide" the screen "apart" to reveal it

iOS did something a little similar through iOS6, with folders having a kind of visual physicality—tapping a folder would "slide" the screen "apart" to reveal it underneath, leaving a clear way out (tap any part of the outer Home Screen, which is still visible at the top and bottom) and making the folders feel like a place, with dimension and location. The down-side was that they were limited to only a few content apps, since scrolling would have ruined the whole effect. Then, iOS7 ditched the whole thing for more-traditional folders (if you've watched the quite-computer-"illiterate" use computers, you know this means they're always gonna feel lost when using folders, now—iOS6 and earlier was the only OS+platform I've ever seen that I'd enthusiastically recommend to my approaching-100 grandma, and expect that she'd do kinda OK at using it unassisted, maybe after some light config of the a11y features). 7 broke a bunch of other excellently-discoverable stuff. The replacement for the unlock slider was especially far into obviously-a-large-step-backwards territory.