I don't expect any unusual pricing. They said that RDNA2 will have the whole range of cards, from lower to higher end, so something matching current Navi cards in price should also be available.I shudder to think of what a brand new RDNA2 / Navi 2x is going to cost though. Must be upwards of 600 - 900 euros. The new consoles can't be much cheaper than that either.
And they for sure going to be better than any APU they'll put in consoles. APUs are lower end by definition.