I doubt a resolution bump is possible. Super high res displays are quite pricey (read: more than 30" res). 23" panels are dying out, so movement to a 24" IPS would be the logical step.
A movement to better spec panels like H-IPS or AS-IPS would be a good move as well. Along with HDCP, maybe HDMI, and hopefully more inputs (I wouldn't hold my breath on that one).
iSight... maybe. I think that poses some difficulties with companies and cameras. It wouldn't be a very good move IMO.