High Quality Lenses are still rare to find in current mirrorless system. But soon this will change.
Sony:
Sony will launch four new Full Frame and one new APS-C E-mount lenses. Three FF lenses will be from Zeiss and one is a Sony G. The APS-C lens is the 16-70mm f/4.0 Zeiss that will be priced around $1,000. That lens will be announced along the NEX-5T on August 29 while the new Full Frame camera+lenses will be announced in late September (24?).
Olympus:
Olympus will also finally launch their brand new fast f/2.8 zoom. And it may be even a second zoom surprise but that has to be confirmed. The Olympus zoom is said to be of higher quality than the 12-35mm X lens from Panasonic.
Still no news from the Canon and Nikon front :(