Said attach rate could hover around or over 30% (representing 7-8 million copies) should GTAIV's metacritic average remain above 95% (which is looking good so far). He notes that an attach rate higher than 26% "would beat expectations." Assuming the game reaches the mark of 8 million copies sold, we're talking around $480 million in sales. And that's before you factor in Europe, which Schachter believew "could do similar numbers."
Schachter concludes his remarks by noting that a potential delay caused by an (in his view inevitable) EA acquisition of Take Two is "extremely unlikely," so all you worriers out there can rest easy.