Heck, even Spreadtrum is moving to 16 nm and Exynos to 14nm... So... Seems that the 28 nm era is about to end.Snapdragon 429 and Helio A22 is probably on TSMC 12nm/FFC. Again this is a very big leap for the cheapest smartphone devices and tablets or Android TV Box, vs old 28nm trash.
http://www.tsmc.com/english/dedicatedFoundry/technology/16nm.htm
Mediatek, take down that trash called the MT 6750.