That transfer method seems kinda low-tech by today's standards. We just transfer our coins wirelessly between devices, with no need for any special hardware...
I kinda like the hardware wallet that they use. Cowboy Bebop didn't envision an internet based peer-to-peer transfer method though. I don't think any one did.
I like the wallets, and I expect we'll have something similar with BitcoinCard later this year, but I was talking about the device they had to slide the two wallets in to transfer money from one wallet to the other. Nowadays we do those transfers using wireless Bluetooth or NFC.