On Gaf, I only remember Gofreak championing the feature (or, at least, not being as skeptical about it as most were). It always seemed like a non-starter to me for lots of reasons.
There were a few of us

Devs might be reluctant to introduce its use for certain things because there are more familiar solutions to the same problems and they might feel it's a risk to try and get people to use a new solution, even if it might have some superior qualities.
In a tablet, because of the size, I think that kind of touch would have to be very centered around gestures though rather than (fast) targeting and the like. If Apple did introduce other touch surfaces I think it would help shake out appropriate and inappropriate uses for that kind of tech, that's for sure.