I doubt low-income housing is going to attract market-rate housing. I can't think of anywhere where that strategy has worked despite repeated attempts.
It doesn't necessarily work the other way either. If so, the area around Berkman Plaza would be booming - they turned dirt with luxury in 1999.
Like field said, I think that sometimes all income-restricted housing gets grouped into things like Eureka Gardens. Vestcor isn't known for operating things like Eureka Gardens, but developments like 11E and The Carling, two properties that they did a great job with.
I'm an advocate for a developer's track record (to a degree obviously). I haven't seen the site plan so I'll hold my full opinion until that happens, but I'd say that the dream of a high-rise upscale residential with solid retail and an excellent site plan are probably a little off for LaVilla at present. This is probably a little more in-tuned with the economic reality.
Also, assuming the site plan and building are good nothing says they can't go upscale down the road.