IMHO at this price point NEX 9 or whatever Sony calls it won't be very successful. Rumors say price for body only will be close to RX1.
http://www.sonyalpharumors.com/sr4-nex-ff-only-15-bigger-than-the-nex-7-available-in-october/
For amateur photographers there is no point to buy NEX 9 when Canon 6D and Nikon D600 are much cheaper now at 1500$. Even D800 can be found at around 2500$. For the price of NEX 9 body they will come kitted with lenses and everything.
My take is NEX 9 will cater for PRO, semi PRO photographers flock and there will be nothing exciting on the video front. Combined with some Zeiss lenses in 24 - 80mm range where size can be kept in control and lenses can be reasonably small (big), it would appeal to the pros and semi pros looking for highest possible image quality in smallest possible package but at high price. This is not a big market but there is some money to be made and Sony will take any opportunity.
There are cheaper tools for stealth photography too:
http://www.43rumors.com/gx7-tets-by-magnum-photographer-thomas-dworzak/
Miniaturization doesn't seem to be an important factor for the majority of photographers and/or usage cases. Sales figures seem to prove such a conclusion.
So far expectations that mirrorless interchangeable camera systems with electronic viewfinder will blow DSLRs out of the water doesn't seem to materialize. Yes there is a sound logic behind mirrorless - removal of mechanical parts and as result cheaper, smaller, lighter bodies, better suited for video etc., but sales reports and analyzes doesn't indicate such a shift
http://www.imaging-resource.com/news/2013/08/09/weak-demand-for-mirrorless-cameras-hurting-manufacturers
http://www.dslrphoto.com/dslr/space.php?do=jranking&view=all
One interesting thing for the majority of us in NEX 9 could be RAW video. But Sony has serious video camera business to protect. Their recent track record on video in NEX and ALPHA systems is rather appalling. Don't expect any revolutionary changes.
Having in mind that market will be flooded with affordable 4K cameras in next 6 months and most likely this will be true for RAW as well, it's better to wait and see.
http://www.hollywoodreporter.com/behind-screen/market-readies-flood-4k-cameras-599612
My bets are on Nikon. If you remember they started this whole video DSLR frenzy with D90. They don't have video business to protect. Rumors are upcoming D400 will have a very large buffer which kind of hints for possible RAW video. V3 may use the new Aptina 1'' sensor, which can output 60p in 4K and will be announced in next month. So let's just wait and see but I doubt NEX 9 will be my next camera.