Much more interesting is how Apple is driving it. Since no one has a 5K timing controller (TCON) yet, Apple went and built their own. This is the first time we’re aware of Apple doing such a thing for a Mac, but it’s likely they just haven’t talked about it before. In any case, Apple was kind enough to confirm that they are driving the new iMac’s display with a single TCON. This is not a multi-tile display, but instead is a single 5120x2880 mode.
This also means that since it isn’t multi-tile, Apple would need to drive it over a single DisplayPort connection, which is actually impossible with conventional DisplayPort HBR2. We’re still getting to the bottom of how Apple is doing this (and hence the sneaky nature of the iMac), but currently our best theory is that Apple is running an overclocked DisplayPort/eDP interface along with some very low overhead timings to get just enough bandwidth for the job. Since the iMac is an all-in-one device, Apple is more or less free to violate specifications and do what they want so long as it isn’t advertised as DisplayPort and doesn’t interact with 3rdparty devices.
Update: And for anyone wondering whether you can drive the 5K display as an external display using Target Display Mode, Apple has confirmed that you cannot.
Right... But this is an isolated case (TCON). Generic components also use generic drivers I think... Only drivers that can´t update, was driver from Apple property and Apple provider this update from Apple Web or BootCamp update...
For example, it's curious that my Macbook Air 2012 only out update, chip drivers, the other It´s update 🙂

I just update and Macbook Air work funny 🙂
It is not W10, it is Apple's BC drivers which they do not want to certify on older hardware, so you can buy newer Macs.
But this is not problem... Only create BootCamp partition and them with USB key install Windows 10 and install bootcamp preference + generic manufacture drivers (much tutorial in the web to do it..)
The first fully-UEFI Macs are Late 2013 models, yet you can install W10 EFI on 2012 models, where the OSX EFI is used as ESP. Macs with 1.1EFI can also be upgraded via EFI update to be UEFI, if necessary, but Apple chose not to do it. This is again due to lack of driver certification.
I interesting read about it. Where can I found news or article about this?
Thanks!