Cool stuff, I really hope it happens.
I haven't seen that angle as well. It would be interesting to know exactly how tall those mid-rises are supposed to be, because the Summit looks way out of scale there. In that model it appears to soar way above Chase Field, in reality its only slightly taller.
I hope he's right about more mid-rise development in Phoenix. The Valley has almost zero 3-10 story urban style developments (everything in this height range is fenced off, stucco and tile, bland suburban apartment complexes) and I think if built, they'll go a long way to creating better neighborhoods and a more sustainable pattern of growth.