They failed with Unite, so? At least they are innovative. See tabs, speed dial, sidebars. And well, Opera is fast with many built-in options. Firefox is slow like hell with many extensions (and I use it with just a few ones)
Chrome is a great BSD project, but even Comodo Dragon is better than Google one. Safari… no comment.
Opera should be perfect with 3d support (got in 12) and a sync for they feeds/email
Btw, I use Skydrive and others Microsoft services with no problem in Opera. Same for Facebook.
They didn’t care about sites who don’t follow w3c standards.