Very possibly true, there.
One thing for sure, peoples' expectations of what this licence can deliver has been raised to a respectable level once again.
'A:CM' was a serious low point for the licence. The licence desperately needed a strong title like this to bring back some much needed confidence in it.
I think sales will be constant, long after other AAA titles are long gone 'ALIEN: Isolation' will still be around.
-Windebieste.