It will certainly be interesting to see what happens, I'm almost more intrigued by the situation in the UK; it could potentially set the bar for further growth and improvement in the rest of Europe once it's available. Unlike (seemingly) most users though; I don't think Titanfall will be a swing or a miss, I think it will be something between the two, selling well but not having a massive or lasting impact on hardware.
A sequel, on the other hand, I think will work wonders.
Halo 2 was crazy, as was CoD: MW 2 and Gears of War 2 (actually sold more than the third installment).