Patent: three wide angle fisheye zoom from Olympus (all starting at 8mm)

Egami (Tranlsation here) spotted a new Olympus patent describing the design of three new wide angle lenses:
8-20mm f/2.8-4
8-35mm f/2.2-4
8-74mm f/2.8-4

From the description you will notice that this are actually Fisheye lenses! Right now only [shoplink 34168 ebay]Canon (with the 8-15mm)[/shoplink] and [shoplink 34169 ebay]Tokina (10-17mm)[/shoplink] have this kind of lenses on market. Is that something we need for the Micro Four Thirds system? Certainly not a priority lens but it’s always nice to expand the lens horizon.