Rather than take other threads off-track where this comes up, here's the place to discuss the merits (or lack thereof) of screens that are not fixed to the back of your camera.
First the upside: When the screen is open, but flush against the camera body, there is no difference from any other camera screen. When the screen is closed, it is also flush against the camera body, but the screen is protected against scratches and other damage. In this position, when you want to shoot only through the viewfinder you get zero annoying stray light from the screen and no nose prints :-) For these reasons alone, I see no reason why every Nikon shouldn't be so equipped.
When you swing the screen to the side, you get the ability to shoot low to the ground, or high above your head without twisting your neck into an unnatural position. For astrophotography on a tripod with the lens pointed up to the sky, the vari-angle is a must, and for macrophotography on a tripod pointing down it is very convenient. For almost any shooting situation where you use live view, the vari-angle is helpful.
The downside: Some folks feel that it is too flimsy for a pro camera, or that if you drop your camera the screen will pop off. In practice I don't see the screen as being any more of an issue than say a remote cable or gps connected to the camera. And that's only when extended. If it is flush, there really is no downside.
Looking for any comments or feedback on this line of thinking.
Comments
I do agree that sometimes a higher vantage point is very useful and unique as well, especially with automotive photography when you're used to seeing photos at eye level. With automotive photography I always find it useful to crouch lower and having a tilty screen would be very useful.
But since I don't do video it's not an end all or be all for me.
But all that stuff about delay of LV shots generally goes for all kinds of DSLR when shooting LV except the Sony translucent mirror types. It's not a flaw of the swivel display.
Think golf is right - a swivel screen would be the weakest link on a D4 weather proofing wise, though mine has survived being frozen solid (it had about 1/8th of an inch of ice on it) with no dramas.
I'd definitely miss it if I upgraded.
No extra setup, cable, choosing WLAN of Cam Ranger, if there are other WLANs around
No extra device (iPad / iPod)
No extra batteries (although LV is emptying the camera's battery rapidly, but this is also the case with Cam Ranger)
No need to fix the other device on my wrist when adjusting the cam on tripod
No strange functions, as CamRanger doesn't like all kinds of settings, focus stacking is not possible in certain modes.
I expected better versatility from CamRanger, some Nikons are nearly fully supported, others only so-so.
It would be better, if one could remove the original screen to use it external or use an internal WLAN, like Canon showed how to do in the EOS70D. The extra device of CamRanger is far away from an elegant solution.