Keep in mind that Update 2 is supposedly not too far behind. As a result, carriers may opt to wait until then to officially push the update, especially if there is new firmware involved too.
I followed the page quoted by maaz mansori .
Went and updated my L930 I now have Folders and Cortana , All my app's and other programs still work ,I'm happy at how easy it all was and would recommend doing it to anyone .
I'm guessing the new Lumia Firmware (Debian Red is the codename apparently) will be announced next week with the Lumia 730/830?
So it would start rolling out a couple of months later?
Just educated guessing tbh, I could be totally wrong.