Howdy! I'm currently running the Windows 8.1 RTM for development purposes.
My issue is one that I also ran into with the Windows 8.1 Consumer Preview. Namely, any 3d game will not run. They'll display a variety of issues from inability to create 3d device to no supported driver found. These games run splendidly on Windows 8 Pro x64. I assume these issues are all related to Dell's hybrid Intel 4600/Nvidia 750M setup. Is there a timeline for updates for updates to these devices to be released?
Sincerely,
Happy Customer