One of the more memorable sessions at this year's EMC World was when Paul Maritz took the stage right after Joe Tucci to walk through the rationale and motivations behind Pivotal.
I'm sure more than a few people walked into the keynote session wondering what this Pivotal thing was all about. Not only did Paul do a masterful job explaining the concepts, he made the compelling case that a platform like Pivotal must exist.
The entire video appears here; Paul starts at 32:00 or so. Very much worth watching in its entirety if you have the inclination.
For everyone else, I thought I'd attempt to summarize some of the core ideas in an easy-to-digest form -- although Paul is a hard act to follow.