The Eye-Fi's "Direct Beam" magicalness is mobile—doing what the little Wi-Fi cards should have been all along. The new models skip your network entirely, creating a link between camera and mobile device.
What gadget? Lots! Smartphones and tablets will get a suite of Direct Beam-compatible apps dropped on them, allowing for in-the-field transfers. So, for instance, you could snap a photo, shoot it over to your iPad, and then edit it with the wonderful new touchy Photoshop. That's a pretty nifty setup, whether you're a photog pro or not. An 8 GB SD model will be out for $80 later this week.