Sony really hit a home-run with the NEX-7 but there is no time for them to sit down on their glorious success. I think the new Fuji camera you see here at Mirrorlessrumors is definitely going to challenge the NEX-7. Maybe Sony could lower the price of the NEX-7 to counterattack Fuji? :)
Joke aside, there are a couple of things that are nice on the Fuji.
1) it has a hybrid viewfinder. Actually the optical viewfinder zooms in and out depending on the kind of lens you use.
2) It has three wonderful prime lenses. Something that we really need for our system too!
3) it has an external phase detection sensor. It’s a new way to get fast AF without having to rely on the contrast AF or SLT technology. Sounds also very cool!
Anyway, I think Fuji did what Nikon avoided to do. A serious mirrorless cameras. Maybe the future battle will be between Canon, Sony and Fuji and no more a battle against Nikon and Micro Four Thirds.