Oh dear.
You clearly haven't even seen a Mac since the mid-90s.
1. I *have* a Canon camera. OS X sees it just fine and even offers me a choice of apps to import into. (iPhoto does a pretty good job.) Apple will write drivers for a manufacturer if need be, but most cameras these days use the same USB "Mass Storage Device" standard anyway, so it's not necessary. Oh, and "Transmission" p*sses all over uTorrent, which is crap even on Windows.
2. Er, right-click is achieved using a two-finger click. (Or a [CTRL]+click on really old Macs built in the 1990s.) The current (and previous) Apple mouse support both left- and right-clicking. And you've been able to plug any USB mouse into a Mac since the first iMac appeared way back in the 1990s. How many Windows laptops have *proper* multitouch trackpads? Oh right: that'd be just Apple's Macbook series! Seriously, if you've never tried multitouch, you're missing out. It's the new "right-click".
3. Unlike the 17" Hewlett-Packard laptop my mother has which is the size of a paving slab and twice as heavy. Thanks, but no thanks: I'll stick with my 17" Macbook. It's not hard to find thin and light Windows laptops, but it's damned hard to find one that can match a Macbook spec-for-spec, and for ease-of-use, *for the same price*.
I have to use Windows 7 at work, but I run it in a VM on my 2007-era Macbook Pro. I'm just about to splash out on the new 17" Macbook Pro model, while my current laptop will be sold, second-hand, for about £699 or so. Try getting that kind of ROI from a Dell.
@ the guy who wittered about Ubuntu: You, sir, win the Missed The Point Award. Apple's gear isn't just about the hardware. It's about the *combination* of both hardware and software. Ubuntu is no OS X. (Come to think of it, it's no Windows either. Sure, it's free, but you can see where the money went.)