While obviously a prototype, and a buggy one at that, the system was pretty good at detecting my thumb's natural position. The results were mostly predictable — and not, it seemed, all that different from Apple's own iPad mini thumb rejection — but Synaptics also wants developers to write support for the system into their apps, which could result in some interesting interface changes. In the simple e-reader concept we were shown, for example, the app could automatically reflow around your thumb. If edge-to-edge designs like those we're currently seeing on phones start coming to larger form factors, Synaptics could be right on time with a finished technology — so long as nobody wants to put a case on their tablet.