I have an XPS 12 (9Q23, Late 2012) and I update it to Windows 10 Technical Preview almost a year ago. It currently works very well except for one key feature... the trackpad (touchpad).
If I install the Cypress Trackpad driver for Windows 8.1 through the Dell support page for my model, it doesn't work properly and it floods my "Event Viewer" with errors.
I just keep the driver uninstalled and I'm left with a dump trackpad that only tracks and clicks with the physical button. No tapping, no scolling, no guestures.
I have been very patient for a long time assuming that you must be working on Windows 10 compatible drivers for this laptop, but now it's gettting close to the official release of Windows 10 and still no updates in the driver download page.
If you have an alpha or beta version of the driver, I would be more than willing to test it out. I just really miss being able to 2-finger scroll.
Thanks!