In doing this, HTC is trying to bring together the bet of both capacitive and resistive worlds. From the patent application:
However, in order to cater to the user's operation mode of using a finger, icons displayed on a screen must be configured in an appropriate size to prevent the user from miss touching the icons. Furthermore, a part of the screen is often shielded by finger of the user when the capacitive touch panel is used. Moreover, a conventional stylus has a small head, so that a user can click small icons conveniently, but the conventional stylus is only applicable to resistive touch panels, but not applicable to capacitive touch panels.
This will give manufactures more options to cater to different markets. It will also allow software developers to not feel so constrained. Even when it comes to data input, sometimes I'll switch my phone into handwriting recognition mode and just write on the screen with a stylus, something that would be awkward at best with your finger.