My prediction: everything will fail, things will look really grim for a day, and then we'll all decide it's 1990 again and reset all the clocks. The only people permanently affected will be calendar printers, who'll have a bonanza of reselling.
Further prediction: rather than fixing things we re-live the 1990s over and over. Ken Starr keeps on investigating Clinton, even after he leaves office. Tech stocks keep going up. And the Apocalypse will always be 10 years away.
-xx- Damien X-)