Thank you Rajshree. The answer seems to be yes it's fine. But I was wondering how well, how fast it runs on a MacBook Air from someone who is using Photoshop, Indesign and illustrator on that machine.
Then you will need to ask users in those 3 forums
If you start at the Forums Index http://forums.adobe.com/index.jspa
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says ALL FORUMS) to open the drop down list and scroll
Thanks all, ended up getting a MacBook Pro 13" 4GB, 128GB. A lot more machine for a little more money.