Some hacks exist essentially just because they can. It's not particularly practical or fast to use Siri to send files between a Mac 512K and an iMac. It's kind of fun, though.
Niles Mitchell has connected his Mac 512K up to all sorts of devices, from a 3DS to his existing current model iMac. Getting the iMac and Mac 512K to talk via Siri in some ways feels like a logical progression, and in some ways just feels insane, albeit the good kind of insane.
Watch a vintage Mac 512K talk to an iMac via Siri [Tuaw]