Well, it's definitely an Opera product... it just keeps getting better.
(yeah, okay, I've been a loyalist since just before the start of Project Magic, so I'm maybe a tad biased... )

Seeing session saving work (so long as you use the correct Exit button) makes me happy, but if feasible, what would make me even happier is automatic on-the-fly session storing, much like the desktop version (i.e. an Automatic Window Storage File, to borrow from desktop Opera's about:config). I love the fact that I can yank out the power cord on my computer, plug it back in, start it back up, launch Opera, and be exactly right back where I left off. It's robust enough that I don't fear crashes in Opera's desktop edition - all the tabs will be there. Getting this going with Opera Mobile on my phone - especially given how easy it is to run out of battery power - would not only be something beyond indescribably awesome.

I'd also like to see keyboard shortcuts (particularly for scrolling)... but, enh. No pressure.