I'm on the top floor and can see some sky if I angle my self right, but anyone lower is just seeing the face of another building. This is a pretty normal view for a lot of people. Heck when I lived in a house all the side windows just showed another house, no sky.
All the side windows is fine. If they make the apartments so that each unit faces more than one direction thats fine. If all someone can see from any of their windows is another building, then thats poor planning in my opinion. Sure, 200 years from now when our population has gone up by a factor of 50 we should be cramming buildings together like that, but why are we letting it happen now?