This discussion touched on so many points, it's difficult to know how to respond.
I don't think of the M9 as being a "legend", but rather as an evolution from the M8 - take several steps forwards, and a couple of steps backwards.
We're talking about what things will be like twenty years from now. Well, the film Leicas won't be of much use, should 35mm film no longer be available. The digital Leicas will probably seem as crude twenty years from now, as what we currently think of digital cameras from twenty years ago (I think that's when $40,000 bought a re-worked Nikon with a giant pack underneath, and I think a connection to a computer).
I'm tired of the digital game. When the first "affordable" (to me) digital professional Nikons came out, I bought the D2h. By the time the D2x came out, the 4-meg images from the D2h seemed tiny. Then the D3 came out, with features light-years beyond the previous cameras. I've got a D3 now (not the "x"), and don't plan to upgrade.... but that's what I thought before too. The "old" Nikons drop in value to next to nothing, and that's more than I want to deal with. With the Leica, older digital cameras don't drop in value nearly as quickly as Nikons, probably because the newer models are just "a little" better than the previous cameras. Actually, in my case (I want to shoot IR photos) the M8.2 is probably better for me than the newer M9. I expect an M10 in two or three years with an improved sensor. However, I would rather not spend a lot of time dealing with all this, and thinking "what if...", and instead would rather just go out and use what I've got right now.
There were earlier comments in this discussion about automationn. I disagree with what people said about always using Manual settings. The D3 is so well thought out, and the electronics works so well, that regardless of whether you're shooting in available light or using flash, you're almost guaranteed to get a technically good image. I certainly agree that it's good for a photographer to know and understand what's going on, and know how (and when) to over-ride what the automation is trying to do, but these are special cases. Most of the time, for most pictures, the D3 does a great job of auto focus, auto-light-balance, and auto-expsure. If Nikon ever thought of combining this capability with the basic design of the Nikon SP, they'd have a winner, but the market share probably isn't great enough to interest them.
In the meantime, I think Leica did a great publicity job of how they introduced the M9. It's too bad the price has to be so high, but I know they've got a lot of people interested. Whether this will result in sales remains to be seen.
(I also think it's silly for people to discuss what the M9 can or can't do, until there's enough of them out in the world for people to be using, and providing feedback. I'd rather read about what the camera actually does, than what people expect it to do...)