There is zero chance that they reveal a new PS4, or a PS5. There is a small chance that they would hint at something though, just to try to take a little bit of wind out of the X1X's sails.

There is zero chance that they would release a handheld, unless they've figured out a way to make something that can play PS4 games in a handheld form factor, that could launch at a reasonable price. But, since they operate in the same world as all of us, this can't happen with now.

I'd say there is a small chance that they could have a VR development. I doubt it though.

I agree.  Sony has nothing to gain, and everything to lose by rushing to the next generation.  I think they'll try to ride out the PS4 family for as long as the market will let them.  And, with mid-generation refreshes, I think that could be longer than the last gen.  

Even if the X1X is a mega hit, Sony has such a huge share of the market right now that they would have no reason to rush into the next generation.  I guess it could cause them to stuff a little more juice into a PS4 Pro 2 or something, for release in late 2018 or 2019.....

Nope, there is no needfor it because PS4 Pro is still very new.

Does Sony need an answer to the Switch?