You release one console, and the speculations over what will be next begin. Check out these really awesome fan made concepts for the Xbox 720 and the PlayStation 4, both featured on Geekologie.

The Xbox 720 concept looks like it could hover or something. And is that green jello in the middle?

Now for the PlayStation 4 concept, which makes use of the Cross Media Bar featured in the PS3's operating system.

Wow. Looks really really expensive. So very likely a final design then huh? (Just kidding.)

Thanks to Geekologie for the pictures, who are credited to their respected creators.

Is That A Spaceship?: Xbox 720 Concept – [Geekologie]

Looks Breakable: New PS4 Concept Art – [Geekologie]