Proposals in the works for new media queries specific to touch enabled devices. Examples include pointer, which will differentiate wether the device has a fine or coarse pointer (finger vs mouse) and hover, which would say if the device supports hover states. I can see this being helpful and useful for building mobile friendly sites where you want good control over interactive elements with hover states.
CSS4 media queries to tackle touch | News | .net magazine
Shift to input concepts rather than explicit lists will benefit developers