Oh, man, we're just looking at the tip of the metaphorical iceberg. There is a ton of new hardware for Apple 2s - replacement power supplies, sound cards, coprocessor cards, solid state floppy emulators, VGA drivers, and even FPGA cards (Carte Blanche).

There is also new software being written for the Apple 2 - take a look at Nox Archaist, for example: http://www.6502workshop.com/p/nox-archaist.html