Exclusive Commentary: Why is it that only MS and Sony are focused on?

[Azuren]

Ka-pi96 said:
Playstation/Xbox are in much more direct competition than Nintendo. They target similar demographics and Halo/Uncharted are both shooters, there's a fair bit of overlap with other genres too, especially the racing genre with GT vs Forza. So it makes sense they'd be compared against each other first and foremost.

Nintendo aren't as comparable to Playstation or Xbox, so it's not as easy to make comparisons.

Pretty much this.