Their promise was that the titles releasing soon would be cross gen, inherently so I would imagine, since they would have been in dev for both platforms already. I do think that there promise was a little hollow in the end, but it's fine. It's expected even... it's just not the cross gen support that some seemingly wanted. Ultimately if you want to play next gen games for any reasonable length of time, you're going to have to shell out on new hardware, I think the appeal for a lot of people was that they wouldn't have to.
It puts PC in an even stronger spot if anything. Since all of those games, even those that don't release on X1, will see a PC release. Everything they're doing seems like a big win for PC gamers.