<p>Unless there are more announcements in the pipeline, and despite the price, I see the D750 as Nikon's official prosumer DX-killer. Forget about a D300 replacement (most people already had) or further support for DX lenses, though I'm sure we'll see regular 18-XX updates! The 20mm lens announcement only supports that. The improved AF is the decider for me, though I'll be waiting to see how it works in practice (the D7000 was a similar improvement in AF but tricky for the user - largely overcome on the D7100).<br>
I regret this, really wanted to stay with DX, but the big plus of DX for me is compactness and lighter weight, and if the dedicated DX lenses are not available then it is not viable for me. I've never been happy with my forays into third party lenses, the Nikon offerings for FX lenses are getting lighter in some cases anyway, so I reluctantly forsee FX in my future, despite the very considerable cash outlay. The flippy screen will be useful, though I'd rather not have it in the interests of compactness, but I've always lusted for the FX viewfinder - seems rarely mentioned but it really is the biggest advantage of FX over DX.</p>