Bottom line, it's probably a good idea to grab the device, touch it, finger it, and then decide whether it works for you. qbunnie put it very well, capacitive vs resistive shouldn't matter on paper. The nexus one bombed (among other things) because it was sold online and nobody could actually touch it before they purchased it.
anyway, I concur, 4.3" is too small. But the app itself on a bigger screen holds greater promise.