I'm not sure about SMF, but IMO the other items in that list are better than their Linux equivalents (at least for now -- when btrfs is officially released, I expect it to outshine ZFS).
Features like these are aimed at people running high-end servers, not desktops. If you ever have to use Solaris, as opposed to administering it, the first thing to do is install the Gnu userland utilities.
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