I would say this is nothing new, as you listed in your OP this has been done with many games before; I think where your reasoning fall short is thinking that Destiny isn't high-profile enough for the common consumer to be informed that it's multiplatform. I mean Destiny is looking/tying to be "call of duty" if this gen, Destiny isn't some niche title that you really need to browse the web to find out what system it's on.
I see nothing wrong with the advertising of Destiny, it's pretty much what MS has done with CoD for years.








