This appears to be moving ahead a bit - The COH Planning Commission approved a variance to reduce of one of the towers distance from the street from 25' to 5'. Mix of residential and retail for this, and it only occupies the north half of one block (Westheimer / Montrose / Lovett / Yoakum)
The tower appears to be 31 floors and 363' to the top of the highest point.
Info c/o InTheKnowHouston
on HAIF
Westheimer & Montrose retail patio (facing southwest)
Westheimer & Montrose retail patio (facing south)
Corner of Westheimer & Montrose (facing west)
Montrose sidewalk section (facing north)