I'm pretty bullish on Brooklyn and its potential and I've talked to many others who are as well. Riverside/Avondale has some infill constraints that Brooklyn doesn't, plus it is closer to DT, the Southbank, and 95, yet still close enough to the restaurants, shops, parks, etc of R/A to get those benefits as well.
I've always thought one of the biggest hindrances to getting streetcar and fixed transit, was the lack of developers/investors lobbying for it. Now the 220 Partnership/Hallmark will be all over it and hopefully the developers of the other projects will be too. Like Ennis pointed out, now there is a funding mechanism in place for it, as well as an example of the type of infill (220) that can be built along a streetcar line. 220 might as well be called a PTOD (Pre-Transit Oriented Development). Lets hope there is more on the way.