OK, I finally found this on our DMV site: "Important Note: These requirements go into effect on July 1, 2010. However, your existing Delaware driver license or identification card will be valid for official federal purposes until December 1, 2014. There is no need to visit a DMV office before your normal renewal date to get a compliant card." Wayyyyyy down at the bottom.
And from what I gather, it will only be relevant on national flights, since for international flights you need a passport anyway. Though I guess in 2014 you will need this Real ID to get a passport ...

Whew. I'm nervous enough about this trip as it is.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)