My point being you're flitting between targetting one group of consumers and another. One minute you say everything should be in a box on a shelf like an Apple product, the next you're saying those people would be wanting to overclock their systems to run a set of user-generated graphics improvement mods for games? Buh? If those people are already into modding games, why aren't they building their own computers? So that's my main point, you're really not being clear with which kind of consumer you're wishing to target. Also I'm failing to see the link between the high res graphics mods and "independently produced content" which requires overclocking.
So now anyone who doesn't want to mod their games is some "vanilla" user whom might aswell just be relegated to the under-the-telly box? I mean, the Farmville thing was a joke because honestly anyone whom is playing "vanilla" games is doing it already because they know their way around a PC and so the only potential market I can see you going for is the "casual" gamer demographic but I think they've already spent all their money on Apple products anyway...If you just want to play vanilla games and browse youtube, why not just switch to a PS3 or an xbox360?
The way I see it is this: there are two main types of consumer, the savvy and the not so savvy. Savvy ones will read reviews and shop around because they value being in control of their purchases and getting exactly what they want. Not so savvy are just looking for something convenient and easy to fill their needs. Products catering to the latter are, generally, more expensive if the user wishes to get the same experience as an informed customer without taking the time to do the work themselves. See also: Alienware. Massively overpriced PCs which you could build for way less, but marketed as a complete package for a "gamer" to get going with immediately after they plug it in. It's like you're trying to aim for the best of both worlds without realising that marketing is about finding out what the consumer wants rather than speculating about what you think would be best for them.
EDIT: I don't supposed you have a link for system requirements for ENBSeries mods, do you?