Choice is good, but confusion in the marketplace isn't so good.
It seems that so far, other than Panasonic's "road map," things have been eerily quiet (SFX: crickets chirping) when it comes to manufacturers announcing lenses for Micro Four Thirds. That's too bad, because -- although lots of us are having fun (and making good pictures) with our adapted M-mount lenses, C-mount lenses, FD lenses, etc., -- the mainstream market is going to want such features as fast autofocus and image stabilization.
I'm assuming that nothing much has happened on the lens front so far because lens makers are waiting to see if Micro Four Thirds takes off and/or for some other lens manufacturer to jump in first.
Samsung's announcement of a conceptually-similar-but-competing format is going to add even more uncertainty and, I would guess, discourage manufacturers further.
Another wrinkle on the already wrinkly face of this rumorplex: Samsung and Pentax have been known in the past to introduce similar "badge-engineered" P&S cameras, and with the appearance of
this leak, there's speculation that they might do likewise with Samsung's NX concept.
Having Pentax on the NX team would lend instant lens cred to the NX standard (whatever it is; Samsung still isn't giving firm details)... possibly more than Micro Four Thirds, since so far the only maker of Micro Four Thirds lenses is non-camera-name Panasonic (although given Panasonic's naming-rights relationship with Leica, Pana presumably could solve that problem with a stroke of the check-writing pen...)
Oh, ugh, it looks as if this could be shaping up to be Canon vs. Nikon all over again, which we really don't need in this economic climate!