VRAM

We already knew that the latest version of OS X Mavericks, version 10.9.3, has provided increased compatibility between certain Macs and 4K displays. It appears, though, that may be in part due to a change in how OS X allocates certain resources, specifically VRAM, on newer machines. As Mac4ever and MacGeneration point out, certain hardware including the MacBook Pro with Retina display from Late 2013 and the MacBook Air from 2013 and 2014 have all seen an increase in the maximum level of VRAM available from 1024MB to 1536MB …
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It looks like the report that Apple has a lock on Light Peak technology for a year was wrong.  Sony has gone ahead and announced their first Light Peak product in Europe and perhaps most interestingly, it contains an External GPU.  TIMN summerizes:

The vertically standing peripheral (pictured above) uses Intel’s Light Peak (yes, the same thing as Apple’s Thunderbolt) via a proprietary port and USB 3.0 socket to connect to the laptop. And not only does it provide an AMD Radeon HD 6650M with 1GB of VRAM, but also allows you to connect up to three additional displays via its HDMI and VGA ports.

One of the promises of Thunderbolt was External GPU video cards.  Imagine hooking your Thunderbolt-equipped, Sandy Bridge MacBook Air (with crappy integrated Intel GPU) to an external Thunderbolt GPU which drives a few 27-inch screens?

I like where this is going.

More shots below:
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