If I had it my way there wouldn't be a Markham or MCC or Vaughan ... just Toronto
Though this is a contested subject, I'm a fan of the extremely large urban core and very small suburban region, particularly in terms of office usage.
I'd love to emulate Chicago and / or Calgary to a certain degree as it fits this model (European cities as well). Calgary is a better example to be honest, Chicago has a lot of suburban use but their downtown is very large compared to the likes of Los Angles and the like.
And with this I'd like to see most / if not all the major attractions downtown (the one and only downtown). I love our Science center but hate the location, no matter what transit gets built to it.
So while I'm not a huge fan of a Casino, if there's going to be one, I'd rather it be downtown.
But alas, Toronto will never be this, given the fact we haven't seen an office building go up North of (hmm, College) and south of Eglinton in ... forever ... too bad ...