I honestly just now read the new class "knight" from PHB2. Sorry if this has been discussed before, but it just tweaked a nerve in me. For most of the history of rpg video games D&D has had a strong influence on them, I think this is just natural evolution of the game as technology progresses. But I am starting to see more and more of the opposite, a strong influence on d20 by the video games we play and the designers play. I don't want to sit at a table and play a mini version of my favorite online MMORG or other game. I also fear 4.0 will be called Instances & BBEG's and have agro as a mechanic and drop rates for certain monsters for specific magic items.
Here is link to knight off the wizard's site, for those of you without PHB2.
http://www.wizards.com/default.asp?x=dnd/ex/20060501a&page=2
It is a tank from an online rpg, basicly it just causes agro (keeps bad guy on him) and has strong defense abilities higher AC and such.
Warlock with it's endless blasts and spell-like abilities is another class I think is strongly based on video games. Not to mention the aura's of the Dragon Shawman from PHB2 and the aura's from paladins in diablo, they even have one just like thorns.
I am not commenting of the power or balance issues of these classes, just I want my game (D&D) to be inovative and influence other mediums not the other way around.