I was skeptical, I liked my ports. Now I plug in all my devices at once, through a dongle. I like that a lot. It works well for how I work: either at my desk, with everything plugged in, or away from my desk with nothing plugged in.
They probably should've moved the ports to the power brick. That would've been ideal.
They did this for the new iMac, albeit only the ethernet port. It's the one that makes the most sense and doesn't appear to result in a larger brick, which I imagine would be considered a requirement by Apple.
I believe there's some third-party hubs available that provide power and ports galore via one or two thunderbolt cables, but you're looking at at least $200.
Power brick as cable hub is a really interesting idea. Feels like you'd have to move away from "brick plugs directly into the wall" to make it work though - imagine sitting in a cafe with your power plug six feet away, and wanting to use both that and some other device.
They probably should've moved the ports to the power brick. That would've been ideal.