I do not know if there is a wipe coming. However, from what I've heard, in the past the only thing this usually affects is way high trias, pps and if you have more then 10 of the same quest item. Example : I have 13 Merc Helms there fore 12 of them might be taken away. These were some of the examples given to me in game.
I assuming, that there will be some kind of 'wipe' when the new client comes out. But as to when and how exactly it will all work, I do not know. Although, I'm not worried about it at all. All in all it's a game and if I have to mine some more to gain more money and fight Tefs and Treps again for more pps, well happy hunting to me. It will just boost my training anyways

There's a brighter side to everything. I look at it like this, if it costs me some pps and some trias and maybe even some stats to get the new client...so be it. I would rather do that then get nothing in return at all