It's not a question of will Infamous move game units, it's a question of wither or not people will buy a ps4 just to play infamous.
A lot of folks seem to question if Infamous will attract new ps4 buyers, compared to titanfall attracting new xb1 owners. It's a valid question I think.
I personally think it will be a great showcase title, and if it's visuals are as good as the trailers, it could attract a few curious users. Titanfall is far more hyped up though, and a lot of the COD fans here at work want a copy. I'm not sure how many will throw down for an xb1 to get one, over the pc version or even 360 version though. Really interested to see how this plays out sales wise next month.