NATO is a small club that makes its own rules as it goes along. NATO already admitted the Baltic states (who have serious issues with Russian minorities), Poland, Romania and Bulgaria. Russia annexing pieces of a neighbor will make all the Europeans nervous. Unlike Georgia, Ukraine borders many NATO countries. Ukraine has many historic ties with western Europe, unlike Gerogia.
Of course it depends on elections, but the Russians are hurting their cause by nibbling at the provinces with large Russian populations (thereby reducing the numbers of Russians in Ukraine), and alienating the rest of Ukraine. In Georgia the pro-western party lost an election. If that doesn’t happen in Ukraine, after the next election expect Ukraine to apply to join NATO and the EU.