I can't think of a single thing that would stop me from buying the FF, except maybe if it doesn't actually take photos.
So here are 20 things I could care less about
:
1. Name on the body; I'd prefer Pentax, but whatevs.
2. Flippy screen - I used to be against it; so long as it stays put and I don't rip it off by accident, I'm ok.
3. Cost relative to 750/810/etc - don't care. Replacing all that glass? Way more $.
4. Has/doesn't have NFC, WiFi or GPS. Whatevs.
5. Stupid crop mode implementation without a lot of user-override options (square! nocrop! bring it on!) But I'd live with whatever they decide to do with DA's. I'd probably dump the few I have anyway.
6. EVF - I used to be dead-set against these, but I could see some sort of hybrid VF being a surprise item. I generally dislike EVF's for long duration tripod shooting (ie hours/days) because of battery drain, but for focus peaking at f/1.4 I could see a use. The massive prism housing screams OVF, so at worst it's hybrid.
7. Actual resolution. 36MP seems to be the best guess. I'd be ok with anything in the 20's. 36 seems to be pushing it a bit; I'd rather have an excellent ISO 12800 shot at 24MP than a 'meh' shot at 36 (or 51... cough... 5ds... cough).
8. Flash sync. I can get by with 1/180. I'd love 1/250, but I doubt it's going to happen.
9. Lens mount; I'd love them to bring back the feedback lever instead of the green button thing on older A lenses. But whatever. I still shoot m42 from time to time, and no one complains about missing that coupler, do they?
10. Video mode; it can't possibly get any worse, can it?
11. AA simulation via SR vs no AA / with AA filter models. Whatev.
12. SR with only 3 stops instead of 5 or 10 or whatever. Whatever.
13. Framerate; 2 fps? 5 fps? 7 fps? 12 fps(lol). Ya, whatever; it'll be fast enough.
14. SD vs Anything Else memory; and at least two slots. 2 slots is kinda a given, and I'll just buy more of whatever I need; flash memory doesn't work forever, and mine is due for a replacement
15. AF module. It's gonna be some silly thing with 27 points clustered in the center 5% of the screen area, right? Which is just fine with me; I shoot pretty much everything with center point focus anyway.
16. Ports for Audio level monitoring; assuming I start shooting pro-level video (and assuming it could even do that), then I'd probably do offboard audio on dedicated hardware and only use internal audio as a sync.
17. Ports for external uncompressed HDMI; probably will never happen, and won't happen on the first gen body. I'd like to have the output stay on while recording, but since I don't expect much from video (ie the broken 645Z video exposure/preview workflow), whatevs; it's not why I'm buying it anyway.
18. Mode dial lock button. There is no going back on this, so I'd be surprised if it was absent. It's probably the only thing I like about the K-5 ergonomics, now that I think about it.
19. Decorative LED's - I poked fun at the K-S1, but that crowd has a
very nice camera and they can disable the disco lights if desired. They don't appear in the 3D prototype, so I'm not worried - whatever.
20. Anyone elses opinion on whether I 'need' this camera or format or not. I held off on the K-3 to check out the 645Z, and decided to wait a bit more for the FF to compare the two. I'll probably end up with both in the end, but not right away. I do need a new body though; the K-5 is getting worn-in, and the K20D backup is getting worn out.
Bonus item 21. Yet another battery type, and $750 grip; probably won't happen, right? Right?
The only thing that would really cheese me off is if they didn't make enough, or if they have a really crappy pre-order process.