I went from a 17″ XP laptop to a 13″ MacBook Air 18 months ago
1) Stick as much RAM in as you can, especially if you’re running VMs, as both OSs will need RAM
2) I found the MBA much easier to use than my old windows laptop, and this is mainly the trackpad, but also the high quality screen. The main difference is that I rarely resort to a mouse with the MBA
3) You could use appleTV, but there is a slight lag as you’re pushing your screen over your network. HDMI adapter would be better for actually working, rather than displaying stuff
4) If you need to run a windows-based game / SW, VMs are the way to go if you want to be able to switch between things. If you want all the Mac’s resources in one hit for windows though, bootcamp is what you’ll need to do
5) Not sure about copying in the image into a VM – you’ll have to ask someone more tech-savvy than I!
6) I prefer Office 2011 on the Mac to 2010 on the PC
7) I’d use Mac versions of office where possible, and dip into the VM only for Win-only SW. There are plenty of equivalents to windows software for most things for your personal use