Who Will Stand the Test of Time?

This morning I was listening to a wonderful record - Quartetto Italiano plays Early Italian Music - Cambini, Galuppi and Boccherini, all from the mid 1700s or so. Do you think there are any 20th century artists people will be listening to in the year 2300? For purposes of this thread, let's be optomistic and presume that society is not going to devolve into "Escape from New York", which it definitely will. But let's put that aside for now. BTW - If you like string quartets, Quartetto Italiano is really good.