This is a great trend. I just implemented it in two apps (iOS and Android). The only time I tolerate tab bars anymore is if it's a reader-type app that hides th

This is a great trend. I just implemented it in two apps (iOS and Android). The only time I tolerate tab bars anymore is if it's a reader-type app that hides the nav and tab bars when you start reading. Why have a 40pt-high bar on screen all the time, when you usually have more than 4 sections anyway? And tab bars don't work on iPad at all, anyway. Android's action bar is a bit better than iOS tab bars though, and I feel like Android tablets can actually get away with that quite well, without resorting to side nav. But if you're going to be consistent, you might as well use side nav across iOS and Android for all device types. It's worked really well for me so far.