Honestly, this is why we should have stuff like anti-monopoly laws breaking apart too-large corps.
Being a behemoth that can just buy up almost all the content producers and then starting your own content distributor (/steamer) and undercut the competition is dirty.
Yeah, I actually like what Sony has done in terms of expanding their offerings on Steam etc, but using stuff like "launch exclusives" to promote use on their own platform.
Some people want to be there at launch or other a given platform for their key titles, while others are willing to wait a bit longer for the product/title to come out on the platform of their choice
We do certainly have some anti-monopoly laws, though not extensive enough in my opinion. However the ones that we do have are rarely enforced properly and effectively. More laws alone won't solve that, we should really have better enforcement as well.