Thanks for posting.
It's more likely that the touchpad and not the driver is what's preventing that feature from working. The pinch to zoom feature will work with a Precision touchpad.
How to check if your PC has a precision touchpad. Precision touchpads are a new kind of touchpad designed for PCs that run Windows 8.1, Windows RT 8.1, and Windows 10. They're great for using a variety of touch gestures to get around your PC quickly. To find out if your PC has a precision touchpad, go to Settings > Devices > Mouse & touchpad. Look for the message, "Your PC has a precision touchpad." You can also change or disable gestures here.
If your PC has the precision touchpad and it's not working, try updating the drivers: http://dell.to/2nMAt2h