The Corrections: Why The Corrections starring Ewan McGregor, Chris Cooper and Dianne Wiest didn't happen

Updated 11/11/2017
(see below)
To all my readers in the states, Happy Thanksgiving. I hope you get a chance to see a movie or two over the holiday weekend and I hope they're not turkeys! While made for tv movies usually give me luke warm expectations, HBO has a great track record in this area, so I'm looking forward to their small screen adaptation of Jonathan Franzen's The Corrections. Also welcome; the fact that have just added Ewan McGregor to the cast. No word yet when the small screen adaptation of Franzen's award winning book - it was the winner of the 2001 National Book Award for Fiction - will be on but it is supposed to go into production next year (2012)  but I'll be watching for it. I haven't read the book yet but in addition to McGregor who will play Chip, Chris Cooper and Dianne Wiest are already on board as the parents. Have you read the book? What do you think about the casting?
The director, Noah Baumbach and Jonathan Franzen, himself, will write the script together.

Here's the storyline: After almost fifty years as a wife and mother, Enid Lambert is ready to have some fun. Unfortunately, her husband, Alfred, is losing his sanity to Parkinson's disease, and their children have long since flown the family nest to the catastrophes of their own lives. The oldest, Gary, a once-stable portfolio manager and family man, is trying to convince his wife and himself, despite clear signs to the contrary, that he is not clinically depressed. The middle child, Chip, has lost his seemingly secure academic job and is failing spectacularly at his new line of work. And Denise, the youngest, has escaped a disastrous marriage only to pour her youth and beauty down the drain of an affair with a married man-or so her mother fears. Desperate for some pleasure to look forward to, Enid has set her heart on an elusive goal: bringing her family together for one last Christmas at home.

UPDATE:
Aaaaaargh! The project fell apart. Noah Baumbach whose projects are my ideas of perfect films—check out the Meyoritz Stories, Frances Ha and While We We're Young all on Netflix—filmed the pilot and HBO dropped it because it just wasn't working and it cost too much money! What a shame!
Here's what the director had to say a couple of years back

“I don’t know that I appreciated how different it was from movies,” the director told Studio 360, and it was Baumbach who couldn’t negotiate his shooting style for the small screen. “I think I shot it too much like a movie. The real reason I think we didn’t go forward with it was it was too complex, and it was really too expensive for the kind of show it was going to be.”

“… we didn’t have dragons. It was the kind of show that most people would do for two cents and we were spending what ‘Game of Thrones‘ spends,” he added.

source: deadline.com, amazon.com, indiewire