Indeed. As stated in the post you quoted It looks like it is going to be a 16gb 7900xtx with better power efficiency and slightly better RT. Anything over £600 will be a disappointment really. Over £700 will be a **** take.
I think starting at £550 would be golden and would hopefully start to eat into 5070ti sales. Id certainly consider one over a 5070ti at that price.
And what are you willing to pay for the 5070ti ? £800+ ?