They are talking about when the expansion hits. Higher level cap = higher item lvl = much better stats. The difference between lvl50 and lvl60 gear was pretty huge, ya? Guess how much the difference between lvl60 and lvl70 will be then... I watched this guy on stream (Moldran) the other day, and he said that you would get upgrades withing 2 days, that you would most lkely have replaced ALL your currenct gear. Myself, I've been selling some of my best gear and replaced them with almost just as good sidegrades.Quote from Resilga
It's super duper hard to replace a mainhand weapon if you already have something with monstrous damage+crit damage+socket. I've yet to see any of the old great players replace their things with any 2.0.1 gear permanently. Mostly to try a new gimmick build but none of them hold up when they want to steadily farm higher Torment levels as well as they could with their old best weapon/source.
I would have imagined a percentage based item like SoJ could be good, but I don't know. Depends on how good the lvl70 SoJ would be, I guess - and how much stats you would lose out on. I think everything else will be crap.