I'd like to see Update Statistics modified to include partitionID in combination with the existing table or indexed view name.
With the improvements of 2k8 and partitioning, very large result sets are being seen at one of my clients that utilizes partitioning. Having to update statistics against partitions that haven't changed in order to achieve the change on the partition that actually needs it, creates additional overhead that is not required. It also forces a change to plans that wouldn't otherwise be altered which causes for memory churn in the proc cache.
One other related note, is that you can defrag an individual parition index, but it will not update the statistics.