I don’t know. But it seems we won’t have as much SPs as once we did. I just read a great article at SSC (short for SqlServerCentral, a great source of research) with this same question. And I agree with them completely: the cumulative update servicing model is ill-suited for server administration.
By installing a lot of smaller updates we will cause more downtime simply to reboot the sql service (or the whole server), even if we disregard testing completely (do NOT patch without testing! this was just an example!).
Read the full article below. Share it, spread the word, because it seems this change will affect MS OS and other products guys/gals too. Maybe we can make a difference.