1. Open a third tab in the browser without all of them refreshing when switching between them
2. Open a fourth tab in the browser without all of them refreshing when switching between them
3. Open a fifth tab in the browser without all of them refreshing when switching between them
Having five tabs open at once is nothing unusual.
I can do #1 and #2 without any refreshing on my current Air. Never tried more than that since there is a limit, IMO to how many tabs I can deal with at once. I think most people, not all, fall into the use case category where 2-3 tabs is the max being actually used. In many cases it's likely one tab. Just saying.
As for this new ipad mini...will be extra thin and vibrate like crazy as the Air 2 does? Hope not, LOL.