I think what's happening RIGHT now is 80205 ----> City Park West/Whittier/Cole, in that order. CPW is almost all the way there, Whittier is close on their heels, and Cole is lagging behind the two, but will move quickly, especially with it's proximity to RiNo and upcoming lightrail developments.
I don't know if I would put my money on Globeville, but if Globeville pops, I think it will pop big. The homes are adorable smaller Victorians, the mayor (and city officials) have been focusing a ton of energy over there, and it's no further from downtown than LoHi and once again, close to RiNo. If I had an investment portfolio in Denver going, I would pick something up over there for $100,000-170,000 just in case, remembering that not every investment pays off and one should diversify. However, I don't think it's the next big urban boom, it's further down the road, if it happens. Not all of politician's plans happen and when they do, it's not always the expected result.