Qualcomm is working on an exclusive SoC for upcoming Windows 10 on ARM devices. Entries for a new Snapdragon chip were found on Geekbench and all clues point it to be a performance-based variant of the Snapdragon 845 adapted for the extra thermal headroom in notebooks and 2-in-1s.
https://www.notebookcheck.net/Snapdragon-850-for-Windows-10-on-ARM-in-the-works.306216.0.html