EDIT: I'm pretty sure I found a pack with rec specs Win 10, but tonight I can't find it. So I must have imagined it all, LOL. Seems like all packs still support Win 8.1.
Oh my... I just explored the packs I don't own on Origin, and I can actually make a bundle - which will be my very first!!! :) I have lots of packs, but I noticed that the latest pack has Win 10 as req. spec., and I am on Win 8.1. This means packs might work still, but I must expect some trouble sooner or later. I was thinking to hold back on getting Snowy Escape until we know what the next EP will be, but now I realize that I might no be able to run any of the future packs on my current computer... So, then there is no point in waiting for their next announcement...
I might bundle Snowy Escape + Magic Realm GP + Mochino SP (photo studio, never remember the correct name, lol)
Both SE and MR come with a new world, and I play Get Famous quite a lot, so I guess I will get use of the additional photo studio features in that pack. I will need to hold back until I produced the final 2 The Bagged Talent shows, though, in case I run into problems (or will want to explore new content instead of editing videos). The wait will be less than 1 week, though, I think I'll survive :)