No links, but perhaps a starting idea -
Go look at the historical performance of the likes of Silicon Graphics, 3D Labs, and other high-end graphics machine/chipset manufacturer that targetted the corporate market. You'll notice their profits drop significantly in the late 90s as the gaming boards catch up to them in performance, at a far lower price.
Now, you could read this 2 ways:
1) The likes of ATI, nVidia, 3Dfx were always targetting the corporate 3D power-users. (But I think you'll find plenty of evidence to suggest otherwise)
2) The motivation for creating faster and better 3D hardware shifted from the needs of the 3D power-users to the needs of the gamer.
But I guess that graphics card element is a gimme. What about other hardware? You could try sourcing a selection of games from over the past 5-10 years, and charting their stated minimum and recommended requirements. Whether or not that shows causality is debatable - and perhaps you should question that in your article anyway (The best articles always look at the other side of the argument ).
You could also look at the market share of AC97 sound cards vs that of the 'prosumer' soundcards. That tells it's own story. Creative sell millions of SB Live cards that make soundcards with good 3D effects and crappy analog/digital outputs (audiophically speaking). But who's heard of MAudio?
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