Yes that's right, baseline resilience, tanking spec, tanking bonuses and a lot of HP will make even mages cry buckets.
Want to take bets on this baseline resilience making your friendly neighbourhood tank impossible to kill within a reasonable time? If you can kill him that is.
I know the patch notes are sketchy at best for now and you will still need to have some PVP items with resilience to boost yourself to some magical cap but look at the current ToT raid gear for tanks. Granted ilvl will be normalised (hate that word) in whatever BG you fight in, you're still dealing with someone who isn't going to go down quick.
And you know what? I bet this gives reason to nerf tanks because they're going to be a massive pain for people to kill.