As the rumored fall launch date for Apple's (AAPL 0.32%) iPhone 6 line approaches, leaks and rumors continue to ramp up. While this week brought us a handful of news about the iPhone 6 to chew on, one report in particular may finally give consumers a good idea of what the phone may look like.

If you haven't been following the rumors and leaks surrounding Apple's iPhone 6, here's a brief summary. The next-generation lineup will supposedly come in two versions: one with a 4.7-inch display and a one sporting a phablet-like 5.5-inch screen. The display will likely be made from sapphire crystal, a display that is said to be more resistant to scratches (though some reports suggest only the phablet iPhone 6 will use this new glass). Other potential improvements include a faster processor, improved camera, and possibly new haptic feedback technology.

While all of these leaks and rumors are nice, investors know that design -- especially when Apple launches a phone with an entirely new form-factor -- will be likely be key consumers' decision to upgrade to the latest iPhone or not.

So, does the design live up to the Apple standard? Fortunately, we might finally be able to judge the design for ourselves.

Check it out:

Alleged leaked 4.7-inch iPhone 6 rear casing. The part was first shared by Feld & Volk. Image source: MacRumors

With rounded corners and an increasingly sleek form-factor, the design resembles the approach to the iPad Air and iPad mini. The leak comes from Feld & Volk, a Moscow-based company that says, for six years now, it has been working with the same factories that supply parts for Apple products. Notably, the leaked part appears to be incomplete, "with some features such as the full set of camera/mic/flash holes yet to be punched out of the shell," MacRumors notes.

Alleged leaked 4.7-inch iPhone 6 rear casing. Image source: MacRumors

But could the part be the real deal? I reached out to MacRumors Editor in Chief Eric Slivka for comment.

Understanding that these are unfinished pieces, I suspect that they are in fact the real deal. The complexity of the interior of the shell means it would be quite an undertaking to fake it.

Thanks to designers Tomas Moyano and Nicolas Aichino, we can examine a rendering of what the finished version of an iPhone 6 with casing like this might look like.

iPhone 6 concept renderings. Image source: Tomas Moyano and Nicolas Aichino

Best of all for Apple investors, this leak is more confirmation that Apple is, indeed, readying iPhones with larger displays. Further, it's good to see that Apple's iPhone 6 is likely to offer a significant departure form the form-factor used in the iPhone 5 and the 5s, giving consumers more reason to upgrade. Historically, Apple has seen a large percentage of users upgrade when the form-factor for the iPhone lineup is improved.

ISI analyst Brian Marshal is among the growing number of analysts expecting a "massive upgrade cycle" for the device thanks to a larger display. Further, he predicts "many 'Android switchers' returning back to the iPhone" due to the pent-up demand for displays measuring around five inches.

I'm increasingly convinced that the iPhone 6 will be a game-changer.