In addition to the Summit, here are some renderings from a Sandy Planning Commission meeting back in May 2019 of the nearby
Centennial Towers project. The planned development has three (!) towers: a 12-story residential tower, a 15-story office tower, and a 17-story hotel tower, as well as a big parking garage and a block of townhomes. This preliminary site plan was approved.
Here are the renderings from the video:
Right now, I think its safe to say that Sandy is making the strongest play to have the "second downtown" of the Salt Lake Valley.