Well the Dell telephone warranty service technician told me that the odds were 90% that Dell would not be upgrading the drivers for the XPS 15z.
Will there be Windows 10 driver support for XPS 15z? If not, please consider it. And please make it proper, because the drivers for Windows 8 were incomplete and some of them, like Intel HD Graphics, were poorly written (flickering on the top of the screen, slow screen initialization on start up...), I had to roll back to Windows 7. As the rumors say, Windows 7 and 8 users will get free upgrade to Windows 10, so please release Windows 10 drivers. I don't want to miss this opportunity.
XPS 15z, Windows 10 drivers?