I think it would be fun to live in an apartment building like this. It would most likely be peaceful, cheerful, and feel like a real community. The article cites vegetarians who dislike the smell of meat and I have to agree. After being a vegan for a while, it is more pleasant to be around plant-based food preparation than meat-based meals, even if you are not eating the meat-based meals. This is why I like to visit vegan restaurants when eating out. It just feels more comfortable and enjoyable. I'm sure the tenants of the vegetarian apartment complexes in Chennai feel the same way.
According to the article, the leasing agents inform prospective clients that the units are for vegetarians and they have to indicate on the rental agreement that they are vegetarian. I think the next step would be to create an urban farm on-site to provide fresh organic vegetables for the tenants. I'm sure that day will soon come.