For me, nope.
Last phone I had with a removable battery was my Gnex and I never swapped the battery for the life of the phone. My S3 had an SD Card slot which was nice for music and nandroid backups, but now I stream all my music and only keep 1 nandroid on my phone so space isn't an issue. Don't need a bigger screen and the resolution is just fine on the G2.
Finally did get to see a dummy unit at the local BB and while it is super slick looking, I think I'm finally to the point where I just don't see the need to upgrade so quickly anymore.