There is no logical correlation between total FW/FM sales, and digital attach ratio. None whatsoever.
Yes I use all the factors when I make these predictions. Of course I am rarely right, but I like to think I get close. A big PS4 game above 20% attach and digital ratio is simply something that I haven't seen before. But now there is one data point that certainly will help with predictions going forward, it just simply won't be a huge factor.