Now that they've taken Gori, it's only a matter of time.
This incursion has shifted the onus on this completely. Back when Russia was just aiding the South Ossetians it was plausible as a defence against Georgian incursion. Now that Russian troops are on undisputed Georgian ground, though, that's gone.
Not that that justifies the "ARRGH LET'S GO KICK SOME BUTT" brigade. But that's the situation.