I don't like your attitude, but his post was a little off topic. You were asking whether there would be gear related incentive to grind to 70 (and beyond). The simple answer is no.
You can go ahead and pvp on your alt. There are, so far, no gear related reasons to grind past 60. I also believe Bioware probably won't add any. Gear grinds are boring anyway, it will be much more fun for you to switch characters.