I bought my iPhone 6s Plus on launch day, and I have thoroughly enjoyed using it in a variety of situations for capturing photos and video. Overall, I am very impressed by its capabilities, though there is always room for improvement. Here are two videos I created entirely in iMovie on the phone: The first is a montage of video captured recently at a Chris Tomlin concert, where I sat pretty far back. I shot mostly in 4k, but zoomed in while recording because I was so far back. Normally I would use digital zoom very sparingly when shooting video on my phone, but with 4k, I get a little more latitude. Instead of a blurry mess, it just softens a little when zoomed in pretty far. I also made liberal use of focus / exposure lock because shooting concerts is very difficult. Normally you end up with a washed out mess if you don't manually turn down the exposure. When I was done at the concert, I used iMovie on the phone to put this video together. Obviously this is not as good as having a dedicated camera with optical zoom, but I think it turned out pretty well. The sound quality is not terrific, but at least it's not completely distorted and inaudible. This one is in 1080p on Youtube. The second video is just something I threw together quickly after spending a couple of hours going for a photo walk near the Mississippi River. I shot entirely in 4k, but also included a couple of time lapse videos. I noticed that as the sun went down, the video obviously starts to get a little grainy. One of the last time lapse shots of the barge was taken when it was pretty dark, so it's very grainy. At the end, a panned a couple of panoramas as well. I don't know why I chose that song - I just like it, even if it doesn't entirely fit. It was the kind of mood I was in. Anyway, everything was hand-held, and I was pretty impressed with the image stabilization on the 6s Plus. This one is in 4k on Youtube. I was incredibly impressed by how easy it is to edit video on the phone in iMovie. Even with a couple dozen 4k clips, the app didn't stutter or crash. And even though you can't do as much in iMovie on the phone as you can on the desktop, it's still quite useful for those smaller videos that you just want to throw together quickly. Youtube, of course, does introduce some artifacts in its compression, so the video quality is not as good as the original. I am getting a 5k iMac soon, and I look forward to having a native way to view 4k videos. In the meantime, 4k is incredible valuable for providing crop and zoom latitude, as well as future-proofing. I'm certainly not going to shoot everything I do in 4k, but I definitely think I'll use it more than I originally thought.