I have also heard of Ainol planing a high res screen model, first it was going to be for the new Basic but i think it all depends on availability of cheap screen and right timing which model will get the high res screen.
I just hope Ainol will continue to give support and updates to end users of older models, or ppl will have to upgrade their hardware often then Apple fans.
I really hope Ainol do care about users using 7A and not just forget about us. If they still provide 7A users with updates, I'm sure most Of the 7A user's next tablet will still be from Ainol due to the confidence Ainol gave them. 7A has been a really good tablet.