The ONLY thing I look forward to with a pagerank update is finding out which pages Google doesn't feel the love for anymore. I don't care if pagerank is 0-10 on ANY page but I get to look for pages that previously had pagerank (of 0-10) that now return N/A or grey bar.
A pagerank update is a great tool in spotting older pages with new issues. Note: the pages very likely don't have new issues, they just don't fit the Google flavor of the month and one of the 200+ (500+?) changes a year did some damage.
More updates please, thanks G!