Yeah, I noticed the exact same thing and although I do like shallow depth of field, many of the close ups in Interstellar were just too shallow and distracting to the point of making me think: "Hey, almost nothing is in focus here, this must've been an IMAX shot."

Note that those shots with distractingly shallow depth of field were most likely IMAX, not 65mm. Keep in mind that the IMAX frame dimensions are:
Diagonal—87.91 mm Width—70.41mm Height—52.63 mm

While a 65 mm frame is:
Diagonal—57.30 mm Width—52.48 mm Height—23.01

It is for that reason I do not believe IMAX is good for close ups.

Sorry buddy, that's not true. ProRes is resolution agnostic, it can be anything between SD-5K and Blackmagic already has an agreement to record to ProRes, so anything the camera can capture it can output as ProRes.

Dude you sound like a PR guy for Nikon lol! But I have the D750 too and do have to agree with ya.

Check out MoviePro for iPhone. I just discovered this app and love it. 3K recording on the iPhone at up to 120 mbps for only $5? Yes, it's awesome! https://itunes.apple.com/us/app/moviepro-video-recorder-pause/id54710114...

It gives you a choice of 2 flavors of 3K/2K, as well as several lower resolutions, all with a choice of bitrate (up to 225% of iPhone native, which at 1080p equates to 50 mbps), and frame rate (including every fps between 1-25, and up to 240 at 720p on iPhone 6). The quick switching between saved presets is awesome too, so I can instantly go from shooting a scene at 3K 24 fps with uncompressed audio, to 240 fps at 720p with audio turned off to save space. Definitely my favorite filmmaking app next to CineMeter II.