I'm not getting an Index because of FOV. If it's better, that's a bonus.
BTW did you notice that your image is cropped on both the left and right side such that you really can't tell how much more horizontal FOV there is?
I'm all about the comfort, edge to edge clarity, lower SDE and improved audio. Some may feel differently, but I think I'm going to like the ambient speaker arrangement. I'm hoping I can get 120 fps in sims even if it is with 60fps reprojection. Fingers crossed.
Now if it's clear edge to edge and the vertical FOV is improved too, that much better to glance down at my instruments
Now outside of sims I'm really looking forward to the new Index controllers and improved tracking over my Rift. I love my touch controllers and the tracking is great until it gets confused. The new base stations are supposed to be a set it and forget it and are not supposed to get confused or need periodic recalibrating like the Oculus does. I also expect to be able to run 120-144 fps in room scale games that are not sims. I'm sure that will be great!
This headset is absolutely all upside to me.