I will never understand the game argument. Ever. I don't know anyone who games nor do I believe that the people who use the game argument "game."
The webcam... what happens when a laptop webcam goes out? Same thing. So I don't see what the big deal is.
What's not to understand? I play video games, and there's no comparison to a MS based PC vs a Mac dollar for dollar. Anyone who states otherwise is a bit naive in my opinion.
Now, I'm not going to go into the whole stupid debate about which is better, as I have both an iMac and PC, and they are used for different tasks. But I can assure you there is a very large amount of people who use computers mainly as a gaming platform.
AMD alone has sold over 6 million DirectX11 capable GPU's. Over 2 million of those are for desktops instead of laptops. None of which, as I can find, are in any of the mid range base units of Dells, HPs, etc. (ie: under $1000). So, either people are purchasing more expensive computers or upgrading their PC with DX11 graphics cards for what? So that they can run MS-Word just a tad bit better?
Take a look at the iPhone. Now most games sell horribly, and I won't deny that. But several games are doing extremely well. Tap Tap Revenge has sold over 4 million copies.
Last year alone, video games had a revenue of $20 billion. The USA and Canada alone totaled about $11 billion, which is more than the USA and Canadian Box Office took in. And yes, most of it is consoles, but computers still account for about $1 billion of that ($500 million for retail sales, and about $500 for digital downloads and recurring subscriptions).
And it's not children primarily who are playing these games. The average age of your typical video gamer is 35, and surprisingly, made up of about 60% men and 40% women.
Now, the above statistics have nothing to do with games on Mac vs PC, as women tend to play more casual games, which can be played fine on either a Mac or PC, but rather to prove that games are a factor when purchasing a computer for many people.