A friend has asked if this will be a "Leica killer" - I don't think so.
Leica's brand is where it is because it sells what it sells to those that appreciate and "can afford" that brand - and by that, I mean NEW Leica equipment. The used stuff that we love to use because it's built so well doesn't, imho, really help Leica's bottom line - yes it is cult status but it doesn't get them revenue.
Fuji's new camera will, I believe, have a lot of M-mount purists moving over to their brand (with used m-mount lenses in hand of course). The m-mount adapter, according to Fuji via DPReview, will be the FIRST adapter available for the X-Pro1 - Fuji's not dumb - they know and hear the folks out there who are not doctors, dentists, movie stars, rock stars, or higher end photographers. They know they can attract enough folks over to this new body.
I'm interested but await more information - I like the files (just jpgs still) out of the X10 P&S so I can just imagine a larger sensor with Fuji's technology... I can see so many folks raising their hands and looking to the sky saying "Thank you !!!"
Cheers,
Dave