They either have alot secret or they're just hoping alots of people will buy it cause its the next Xbox. I mean at this point i don't think a new Halo game will save them, they cancelled Scalebound. They need something new for people to enjoy, multiplatform games that run better or (true) 4k graphics (like how do you get more true than 4k) I don't think will be a big enough drawn for them.
I'm also concerned about nintendo, they basically promised the switch would jave game's and how many are there, like 3?
Also Sega, this new sonic, while love sonic and will probably play it. I feel like it's going to break them completely, they were just starting to get a good thing going with publishing and PC gaming, and now they're pooling thier resources into another modern sonic game, let's hope Sonic Mania does well and get a physical release.
Next I'm also concerned about portable gaming, apart from the switch, which isba hybrid, portable gaming is almost dead. The 3DS (Still nintendo) is slowing down game wise despite having a new system revision releasing soon.
The PSVita has long been dead.
So we need something new here, and thats where someone New, mircosoft or Sega could make thier mark. But the chances of that happening are slim i think.