There's a couple of things that could be better.  The CPU is a quad-core 1.6GHz A9, up from the quad 1.3GHz chip in the Nexus 7, but the new A15 core in the (Samsung-built) Nexus 10 is significantly faster.  And despite the slightly larger screen, the resolution is still 1280x800; I really want to see 1920x1200 at this screen size.  1280x800 is adequate, but a little short of ideal.  I've heard that the screen resolution is limited by the Wacom digitiser - the Note 10.1 is 1280x800 as well, where the Nexus 10 is precisely double that, 2560x1600.

1 Ermagerd.
I'm looking at upgrading my current 1GHz/4.3" phone that's about two years old.  I'd love the Note 2, but I can't quite afford it, so I'm looking at the GS2/GS3.  It doesn't seem like there's a huge difference in performance between them beyond the shipping OS version; if I got a 2, I'd probably root it and put JB on it if a custom ROM is out yet.

2 The big difference is that the S3 is 1280x720 and the S2 is 800x480.

The S4 is expected to launch pretty soon, and will probably be 1920x1080.

3 Yeah, and there's like a .25" diagonal difference as well.

My current phone has the same resolution as the S2, so the effect is that I just don't have the higher resolution.  I'd love an S4 (or preferably a Note 2 (or 3, because that's probably coming soon too) but I'm not sure I can swing the cost. Could just wait a while, I guess.
BTW, you have an amusing spam comment at the moment: "When I initially commented I clicked the "Notify me when new comments are added" checkbox and now each time a comment is added I get three e-mails with the same comment. Is there any way you can remove people from that service? Thank you!"
Obviously that's not appropriate to here, but it would be funny if it were actually true, and I guess you have to grudgingly give them a point for not using the typical lame comment.  But you have to take a point off for not realizing this would happen (notice the commenter's "name".)