I know nothing about mirror less other than the name implies.
I was wondering what they will offer in terms of picture quality or video quality.
There are already several mirrorless interchangeable cameras on the market (Samsung NX, Sony NEX, Micro 4/3, Nikon 1), just none from Canon yet.
In terms of picture quality, it should be in line with what you'd expect given sensor size (APS-C).
Video depends more on how much effort they put into video performance. I've found that mirrorless cameras are quite good at AFing in video mode, probably because the lenses are designed to be used with contrast AF.
Because it's a new system, there will be a very small range of accessories available to begin with.
Will they be better than the Rebel T4i or fall in between a point and shoot and a Rebel. Or do we need the specs first? I was just wondering what people expect that they may deliver and will a mirror less offer some advantages over the current technology?
The main advantages are smaller size, and the ability to adapt old manual focus lenses. They are really all about getting SLR level performance into a compact package. When you don't mind lugging a larger camera around a DSLR is a better choice but the mirrorless cameras offer similar performance in a much lighter (and sometimes, smaller) package.