As I had some success with Debian Stretch on my desktop this week, I decided to give it a try on my ultrabook. For reference purposes, it's a Samsung ATIV Book 9 13.3 (NP900X3K-K01US). While the touchpad originally didn't function in the installer, it worked just fine once Debian Stretch was installed. The problem I ran into was that I couldn't enable tap-to-click in the touchpad settings. After some research, I discovered that apparently one way to solve the issue was to remove a conflicting package called xserver-xorg-input-synaptics. As a result, I ran:
sudo apt-get remove xserver-xorg-input-synaptics
Once completed, I restarted the laptop. After logging back in, I was able to go into Gnome's Mouse and Touchpad settings and it allowed me to enable tap-to-click!
This seems like a bit of a drastic workaround, but it seemed to work for me. Hopefully, it works for you as well.