Good morning!
Well, this is an interesting post (to me anyway) and since no one's bit yet, I'll be the first.
Interestingly enough, I kind of feel the same way about the "desktop space thing". I'd like to be able to use my pc desk as a "real desk" to sit at and write out bills, read or whatever, but I can't because I've got my monitor, speakers, microphone, CDroms and other pc-related crap all over the place.....but I guess I'm whining because I can't afford a bigger apartment, so I could have a second bedroom, so i could get a real desk (L-shaped, one side for pc, other for "work"

Oh well, someday.
Even though you don't game much anymore, I'm sure you're used to the full size keyboard and real mouse feel. As well as a decent monitor. I use laptops fairly often at/for work and I can tell you, I don't like it one bit. Usually, they have the touchpad-mouse thingee, which sucks bad no matter how you tinker with the "sensitivity adjustment" in the control panel. Also the display just rots. There's nothing like a real monitor to view text on. I know all about docking stations and things like that. If you're gonna go thru all that trouble, not to mention the $$$ to buy all that crap, why not just stick with a "real" pc to begin with?
I don't think you're a "casual user", simply because you're posting here! After seeing what you've seen and know ing what you know, do you really think you could be happy with a laptop? Do you travel a lot? I honestly would have to get a laptop if need be if work didn't loan one out when I travel on business. Even for just surfing and emailing, I need a real keyboard and mouse. Not to mention a screen that I can read w/o having to tilt my head exactly 34 degrees south because the laptop's screen doesnt' "angle" any farther. I say keep what you've got and get a bigger desk. Good luck.