The steep terrain there, known as Granite Canyon, is located within the Grand Teton National Park.
Current access is backcountry gate and hike only.
The whole area is a terrain trap and contains very few ‘safe’ zones.
So allowing easy access to anyone with a lift pass could conceivably lead to a serious loss of life.
There’s certainly near unlimited ways to do so in the mountains over here.
In fact if you’re new to Jackson, avoid the whole Granite Canyon area.
There is good news too though.
So at the very least, if you love to shred the frontside of Jackson, life should improve.
Sources:
http://unofficialnetworks.com/2015/11/jackson-hole-stoke-new-teton-lift-opening-this-december
http://www.powder.com/stories/news/teton-lift/
http://unofficialnetworks.com/2015/05/the-teton-lift-will-change-jackson-hole-forever-here-is-why