Meanwhile, pictures have surfaced of the latest prototype floating around Meizu's labs, looking both as slick and as litigation-prone as ever.

ENGADGET: Meizu M8 finally launching in August? Mobile

Sony's no stranger to the odd e-ink device, but its latest prototype creation isn't targeted at the bookworm, it's intended to educate.

ENGADGET

Thankfully, the Oculus Rift VR headset met those exact specifications in its latest prototype update, going from a 5.6-inch LCD to a 7-inch 1280 x 800 display.

ENGADGET: Hands-on with the newer, larger Oculus Rift prototype (video)

Here at CEATEC, we bumped into these folks who kindly offered to strap us onto their latest prototype arm -- a slightly smaller variant of the one installed on Cyberdyne's current suit.

ENGADGET: Cyberdyne HAL robotic arm hands-on (video) Hands-on

The latest prototype comes from General Motors.

ECONOMIST: Selling fuel cells | The

Rao's latest robot prototype is "Mitra" - meaning "friend".

BBC: The robot that reads your mind to train itself

Taking up residence in a corner of CES Unveiled 2013, the company's latest multi-touch prototype now measures in at 84 inches, far surpassing its 46-inch predecessor, with 100-inch versions waiting in the wings.

ENGADGET: 3M Touch Systems 84-inch Projected Capacitive Display hands-on

On the day we visit Fisk he's about to launch the first prototype test of his latest invention -- an environmentally friendly cement and building structure.

CNN: 'Mad scientist' to build greener future with 'megacrete'

The start-ups are the latest companies to qualify for support from the Prototype Fund.

BBC: Scottish games developers win grants of up to ?25,000

There is, however, the slight problem of the Lumia 920 not yet shipping: unless you've been blessed with a prototype of the Windows Phone 8 device, Apple and Google are the only ones that have their latest navigation software on a phone you can actually buy.

ENGADGET: Nokia stacks up its maps next to Apple's and Google's, politely suggests it comes out on top (update: more detail)