The new, increasing interest on the mirrorless shows a market tendency. The most successful proposals are: Olympus with PEN E-PL2 and PEN E-PL1, Panasonic with LUMIX GF2, Sony NEX-5. They have gained a a very interesting percentage of sales.
And in the other hand, Canon and Fuji just yesterday on Reuters have expressed a great attention to the mirrorless segment. Surely they can not leave eating slices of market so lucrative. But this would be a step toward a very high competition.
Fuji would become world No. 3 in cameras, surpassing Samsung and Nikon; Canon would keep ahead; Sony is an increasingly strong competitor and Panasonic too.
When in 2012 all will be present with their new proposals, the market could have new sales rankings and a new winners list.
I am curious about it!

Olympus PEN E-PL2: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA Olympus PEN E-PL1: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA Panasonic LUMIX GF2: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA Sony NEX-5: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA