I dont think theres room to call any of the modern cars the classic. Bearing in mind the classics where the bog basis of motoring inginuity, the very start of the motoring trade, and with the most basic technology to get the car from a to b as possible, and I really dont think that cars with our level of technology could ever be deemed a classic!
right now a classic means a fantastic piece of inginuity, which started the ball rolling and made a massive play on the modern day world, when our cars are old enough to be deemed "classics" they will be "classics" roughly translated to "old codgers" of the motoring world.
I think the likes of the "suzuki lliana" and the likes of the car that didnt really sell a great amount, would possibly be deemed a classic in years to come, perhaps even then, the "nissan pixo" (I believe that the bog basic is four wheels, electric PAS, stereo - end of list!) might qualify!
But to keep the true "classics" meaning, the one car that in decades time people wish they had... I think it has to be the Cee'd (Its a top gear car, its obviously cool
...on a more serious note, I really dont know what would be wanted. I mean you have the top of the level Merc SLK mclaren - No one will be able to afford those in years to come. But perhaps, the only one I can really think of now is the likes of the old Focus RS, as I dont believe that there is any intention to bring out a new focus RS on the new shape. so perhaps the legacy ends at the MK2.5, again a fantastic car, you may not be able to get, and maybe it will be deemed the right kind of classic!