The Fujitsu Lifebook 2013 Concept unites a laptop, tablet, phone and camera together in one device. Even if we've seen devices that come close, this concept takes the cake when it comes to multi-functionality.
The ASUS Padfone may be able to transform itself from a phone to a tablet, but the Fujitsu Lifebook 2013 takes that idea a few steps further.
Where a keyboard would be, the laptop holds a small tablet. As soon as the tablet is in the slot, the tablet itself becomes a full size touch-based QWERTY Keyboard.
While this may seem a bit silly, imagine if the tablet could just as easily transform itself into a sketchpad or a second screen for gameplay. I could imagine that being quite useful. It is also helpful for syncing the contents of your phone with your laptop effortlessly and without any wires.
The KT Spider Concept is a laptop we first saw at IFA this year which syncs your phone with your laptop with a similar slot, but it doesn't replace the keyboard. The Fujitsu Lifebook 2013 concept goes much farther, and also includes a slot for a smartphone on the outer case of the laptop.
I think the pouch for the phone looks awkward, and I'm not sure folks would prefer typing on a tablet screen in lieu of an actual physical keyboard, but I can see how this could be helpful for sketching things or for certain kinds of gameplay. I also think that as more and more folks begin using their smartphones as cameras, the need for a device devoted purely to taking photos lessens. But who am I to judge an imaginary device? This is an interesting concept, nonetheless, especially for multi-screen gameplay!