I say, those C or N users who already bought thousand of dollars into those systems can't be bothered about what Sony invest\invents\introduce in the DSLR world(actually they do, but it's the denial thingie :cry

.
Only time will tell but as a matter of now, SONY products works. Will they survive and thrives like C or N, maybe but again time will tell.
I guess users looking for a DSLR needs to be assured their product macnufacturer don't abandon them when they go bust or bye-bye. And Sony makes almost everything in the electronic gadgetry world, so they are no whims.
C or N users might not want to know that fact - it hurts knowing a giant is stirring up in their C/N world.
BUT, personally apart from Sony taking over KM photo division, which itself assures me of the A-mount system continuity for my old KM 5D and lenses - AS or SSS and DRO is a major factor I choose A700 and to continue with the system.
Yes - future SONY DSLR users -
SSS and
DRO is one reason to go Sony. :thumbsup: These are built-in tools for the Average Joe to have more image which are keepers. Also save the pocket, unlike C/N users with their IS or VR lenses, which are more ex as compare to non - VR/IS lenses.
For the Average Joe...ppssssst - Sony makes digital sensors for the some of the other brands DSLR.