Do those actually have a notably large ASP and unit volume these days for console games?
I'm mainly asking since looking at the release list for 2015, a lot of publishers seem pretty comfortable dropping last-gen at that point, even if they have it for all their Fall 2014 titles.
I imagine this varies based on the type of title, but I guess if there's a way to ask that question in an "overall" sense without being too sweeping.
Looking at North, Central and South Americas, for example... territories outside of the US and Canada can account for around 6-10% of total sales. And the adoption rate of new consoles is quite low.
One way to look at it is, "hey, that's not a big number. And if you go new gen only, you're probably going to sell so much more in the US and Canada that you'd more than make up for not having the old gen versions". And you'd probably be right, particularly for the Core stuff.
The other way to look at it is... "okay, i'm a publisher. I've built sales and distribution offices in Brazil or Mexico or Czech. We have developing markets in these territories that are showing strong growth, better growth than we're seeing in more developed territories. In order to keep those territories growing, and keep those new customers happy, I have to have versions of my games people in those territories can buy and play".
So for a while we'll still see the FIFAs and CODs and those games that might have more global appeal keep going cross gen, while new IP, and games with a very Core focus (open world in particular) coming on the new consoles only.
It's a very tough balance, knowing that the big upsides are on the new consoles, but HW adoption rates trailing in developing territories.
Ubisoft's approach with Assassin's Creed is a really interesting (maybe the best?) approach to this challenge. We'll have to see how they do.