The large 7 lot assembled on the south side are/were owned by Concord Pacific are it was supposed to be a 7 storey market housing project called Greenwich. Concord meet a lot of opposition and as far as I know they wanted/did pawn of the property to the COV as part of CACs for their Colours/Panaroma project at the Cambie bridgehead.
The NE lot at Hastings and Abbott is owned by Holborn, not sure what their plans are with it, and don't know if they own the two single storey lots immediately to the east. With the success that Salient and Westbank have had in the area they can't be waiting for demand. I can only guess that they are hoping for height limits to be further reduced at some future date, but the allowable height and density are already extremely favourable for development. Perhaps just another holding investment.