It completely felt like a series finale to me as well. Considering they had that resonating song by the Stones "You can't always get what you want" playing as Hank drove off into the sunset.
I think the producers of the show are smarter than that though. Considering that every season finale, and truthfully every episode, has had a meaningful song that ties into the emotion struggle of Hank's. I choose to believe that theyportrayedthe season finale as a series finale to show that Hank had finally reached his lowest point and will start his "Ascension". An ascension that will be designed by Hank and will carry him as far as Icarus's wings did. All in all, I don't believe that this will be the end of his troubles.
Everything seemed to set Hank up to fall into a shaded world. Working with his mock family and surrounded by his demons forcing him to relive his mistakes while they're being examine with a magnifying glass and a production crew. I think he'll pour his all into this work hoping that it will be the beacon that will bring his family back together. Unfortunately, I'm sure that it will only lead to moredespair considering that the book that the movie is to be based on was suppose to do the exact same thing.
The last scene is whatcinchedit for me. He literally into a fabricated world where everything is alright while The Stones play the grim reality over the top. I may be reading WAY to into this though. ;-)
OH! Kudos to YankTuran for giving props to a Studio 60. I will never get over how 30 Rock won out over that masterfully written show.