Not the UP site... but, to the east, immediately across Capitol Street from Shamrock Development's $200M 'Capitol District' project (block where 'Apartment tower' appears below), which is finally getting underway as this story came out.
Rendering of Capitol District looking south, Marriott on left. The 'ghosted' structure is right about where HDR should be, probably about the right height... perhaps no coincidence it's in the rendering.
We have yet to see an HDR rendering... but expectations should be high, given we're talking about a top 10 architectural firm here.