It's an interesting idea, but I recently got a 5k iMac and now I can feel the jaggies on the 1080p displays I use at work cutting my eyeballs. The longer I use the Mac at home, the more I get used to it and the more annoying the screens at work become.
For sub-27" displays these days I think 4k is definitely the way to go. Affordable modern graphics cards are perfectly capable of driving such displays now and I think, or at least hope, that by the end of next year they will have become a pretty standard mainstream choice. A non-standard aspect ratio is all well and fine, but if it's still at standard dpi resolution it's just icing on a cake that's getting towards the end of it's shelf life.
For sub-27" displays these days I think 4k is definitely the way to go. Affordable modern graphics cards are perfectly capable of driving such displays now and I think, or at least hope, that by the end of next year they will have become a pretty standard mainstream choice. A non-standard aspect ratio is all well and fine, but if it's still at standard dpi resolution it's just icing on a cake that's getting towards the end of it's shelf life.