I would love to see face and voice recognition technologies used upon unlocking screen or when starting device for security. It could also be used in IVI to distinguish between users and load their preferences accordingly.

The use of location for adjusting settings such as connection, possibly other phone related settings like Mrsellout pointed it out would also be welcome as long as we can overcome the strain on the battery.

There is only a thin line between useful hence cool and annoying. Good example is Win7 and Vista; so many beautiful new features and no way to switch them off. People like changes, new looks as long as they can find the old features as well with at least the same details as prior. For this reason user should always have the power to permamently overwrite things or to describe rules and conditions.