She's always looked good, but probably didn't look any better in 1969 than she does now.
Cars are 'styled' and are therefore subject to fashion whims. So a car of 1969 looks awfully old fashioned by 2011 standards.
Concorde wasn't styled. She is the shape she is because that's the shape she needs to be to enable her to do what no other aeroplane could do - carry 100 shirt-sleeve comfort passengers at Mach 2 and 60,000' for up to 4.5 hours.
Concorde was form following function. Her beutiful lines did not come from a stylists drawing board, but from those of the aerodynamicist and other engineers involved in her design. So she hasn't dated!