It is very common now for final season sets and complete series sets to be released around the same time (or on the same day). HIT's distributor, Lionsgate, is preparing to release both items for Will and Grace on the same day next month. It's quite common now. And if that's not the way to go, then they release the complete series AFTER the final season. No one does what HIT is doing, which is what makes their decision so strange. Either HIT isn't very smart (not likely) or they're confident that those who want Season 4 and are willing to wait will do so. And if you're not willing to wait and have to have the complete series set, well hey, they'll be happy too.