Well, we´ve now got the D4s with minor improvements (as expected). But there are two things i noticed and wonder if that´s good or bad news for you:
1) Still xQD & CF Card Slots - good: Nikon shows it´s commitment for xQD, however, (the bad) with all the rumours arround Lexar´s exit the future of xQD remains still unclear
2) High ISO ISO 409.600(!) - it seems that as the megapixel race has ended (for the moment) in exchange for another race - the one for crazy high ISO´s
Anything else got refinements (video) and - good news - the pricetag is "just" 500 USD higher compared to the D4.
My Market Analysis:
The D4s will sell - no doubt about it - may it be pro´s needing the latest and greatest or amateurs with off-limit budget. Working pro´s (referring to newspaper guys etc.) will stick with their D3s as the gain compared to the D4 wasn´t enough to make them move already. For D4 users the gain is even smaller and assuming they burned USD 6k back in 2012 they´ll not burn another USD 6.5k for minor improvements some 18 months later. In fact i see dropping D4 used prices whilst D3s are stable and recently even slightly increased and this situation will aggravate with the availability of the D4s. Speaking in Dollars - whilst the D4 was end of 2013 at arround USD 5.8k (approx.20-30kk actuations, mint condition), it fell to USD 5.2k within roughly 2 months. In comparison - the D3s ended last year at USD 3.8k and is now available at USD 4.1k (approx. 20-40k actuations, mint condition).
Not sure if Nikon is exactly aware that they´re losing the larger number of their pro´s (possible D4 buyers) to either used Nikon stuff or lesser bodies as from their business perspective cant justify a D4/D4s. By that Nikon also makes this group vulnerable to offerings from other brands.