With something so preference-based, one is hard-pressed to argue better or worse without agreeing on the standards of evaluation. Put another way: I don't think discussing it in binary terms of "better" or not will do much good.
If you like Solarized, or it's good enough and not worth the trouble to switch away, simply don't.
Solarized wore on me after a while. I switched back to Monokai for Sublime Text but found that it was too bright for my taste when used in a terminal. I have since rolled my own subdued/pastel variant of Monokai's candy-bright colors in a few places.
This looks close enough to what I had that it will provide the feel I want, without me having to do much more work to port it to different environments or application configurations.
I, for one, am getting a bit bored with solarized. I am looking forward to a fresh coat of paint! Not because solarized is bad, just because I like variety.
I like Tomorrow and everything, but I've got Solarized on my iTerm, Vim, etc all set up already and it's probably the only theme I've felt 99% confortable with and which didn't give me eye strain after 48 hour marathons. What's the benefit I'd get from switching? Being "new" doesn't cut it, is there some science or statistics that make this theme viable in place of Solarized? If not, then the title is misleading.
Solarized is awesome, but lacks sufficient contrast for some of us. Currently using a modified version of Soda Theme, but always looking to mix it up, so might try this out!
One big reason I use Solarized is because the colors /and/ color relationships are preserved between the light and dark mode. This doesn't seem to be true for "Tomorrow" and "Tomorrow Night". Tomorrow modes look similar enough though I like the care that was taken with Solarized.