Sony is doing it with alpha lenses too. The f2.8 70-200 now sells for $3000, and the 70-300 sells for $1100.
I'd expect a 30% price incease and little to no real improvements.
This fits with Sony's new 'premium' price plan.
I doubt the a6000 replacement will have any significant improvements either besides AF marketing and weather resistance marketing - like the a7ii.
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Cameras with mirrors - Just when I thought I was out, they pull me back in
It still remains to be seen what kind of camera it will be. IMHO just weather sealing and faster AF won't urge lot's of a6k users to upgrade. It has to be something substantial in the image IQ department, like IBIS, or better high ISO or something else. Maybe they can put 4K for 15min like Samsung did with their nx500, but again just 4K alone won't be enough to raise the price and push a6k users to upgrade. It may be a good camera for users coming from older "NEX" series though.
I think Sony got itself in the corner with their fantastic a6k. There's simply not much left to improve without raising price of camera. Pricing is going to be a tough decision for Sony. Price it too high and you'll risk users migrating to FF, price it too low and things may get even worse (profit cut and even undercutting sales of FF in case if this new camera will be
too good).
Lens situation is also delicate, since there are almost no weather sealing lenses at all in aps-c. Why would Sony introduce a weather-sealing body if there are no lenses for it? If that is the case then i hope Sony will show a roadmap for aps-c lenses, I'm sure users will appreciate it.