Pretty huge. People were building pc's solely for the game. Ancedotal, but my brother in law (solely PS4 player) is getting an X1X for it. He was planning on buying the most expensive pc he could for it till I told him it was coming to the xbox one due to the preview program.
Even with jank I think it'll be fine honestly with games like PUBG being pretty new experiences for console gamers.Pretty big. I have a feeling people are going to be a little disappointed when they dig in though. It's fun but janky as hell, and honestly? There's not all that much to it.