You are living in the past, and yes. They aren't making a billion dollars if they are spending 500million to make it. Angry Birds by comparison wipes the floor with AAA returns.
What BD is saying is not at all out of the question in the next few years. I admit, I am not exactly excited by that change, but on the plus side, the PC is actually a VERY good candidate, however I think mobile is where everything is going to go. Why spend 500 million for 5-6 million customers when you can spend less than a million and make much much more.
The problem is companies are greedy and want to control everything. Is there truly a reason to have a Xbox One vs a PS4 when 95% of the games are exactly the same across them and PC (and figure that the money you save on buying them on PC will outweigh any overage costs for a PC). Most companies don't want to tie themselves to one platform anymore because 5-6 million sales is no longer considered successful (and I have to laugh at that).
In the Nintendo/Sega era, multiplatform games actually had completely different dev teams and outcomes. There was a reason to be biased. That hasn't been the case in awhile and has come to a complete waste of time with this gen. it is as outdated a mindset as the 2 party system.
Right...the trend in recent years has been towards cross platform games, both big and small. I don't believe in a unitary future where games are all mobile, and consoles and PCs as we know them have ceased to exist. I think consoles especially will continue to remain important for quite some time, but they're not going to be as influential as they used to be. In light of that, it seems more and more silly and unsustainable that they're sectioned off like they are.