OK, then the problem will be that if a laptop becomes my main computer, I'll need a docking station.
However, if I keep my main computer (say an iMac), does it make any sense to get a laptop as well ? It will probably become very annoying to have two personal computers, with a lot of time spent on copying files from one to the other ?
As off right now, I think the two main options for my situation are :
1. Get an iPad for simple stuffs on the go (internet, email, contacts, tasks, calendar, watching sports in the subway, ...), and keep my current iMac for the time being (I will upgrade my iMac later)
=> that solution would mean that I use my blackberry for phone calls / text messages, and my old ipod nano to listen to music and podcasts when I walk.
On my everyday commute, I'd carry 3 devices (blackberry, ipod nano and ipad).
2. Sell the current iMac, buy a 13-inch MBA with an Apple Thunderbolt display, and an ipod touch for everyday use.
=> I'd have my files on one computer that I could take everywhere with me, a big screen to do photo editing and work at home, and a small device to listen to music and watch videos in the subway.
That solution however is much more expensive, which makes me wonder if that is not too much for my needs.