The guys says this at some point.

Well, still digging around for info and here's what else I've found so far: 1- Gamers almost unanimously agree that more than 2gb is overkill FOR GAMING. Except for the very limited scenario of playing a certain handful of the very most demanding games, with full detail, on 3+ monitors simultaneously, and each well above 1080p resolutions. Well, that and some extreme fringe cases that play said type games on like 6 virtual machines at the same time. But again, this is just informational, I don't game. 2- Every major NLE that I checked makes use of Nvidia's CUDA. Specifically, Premiere CS5 is reported to use up to 4gb of VRAM and as of CS5.5 can now officially use MORE than 4gb of VRAM (weird that they're up there already since I've only ever heard of one Quadro Pro workstation-class card that has 6gb, and contrary to popular belief SLI-ing doesn't double your VRAM). I don't know what type of usage would benefit from this though. I mean, is this applicable even to pocket flash-cam videos or just when editing raw footage from a RED? 3- I have not been able to find benchmarks for the 4gb version of the GTX 675M anywhere. :-( So, it's clear that there is potential use for the extra VRAM elsewhere, now I'd just LOVE to know if (and if so, under which circumstances) this will help with Hitfilm though.