Lets agree, right now Intel says max VVT=1.4v for 980x.

Intel has been conservative enough to reduce to vCore to 1.4v (from 1.55v),
does this VVT-increase means Intel has improved the Uncore dramatically?

If true, Intel said max VVT=1.35v for i7 45nm, and it has proven to take even 1.5v ,easily, for 24/7 use.

It is to early too say anything for sure about 24/7 VVT, but I believe there is a good hope that these chips can take a lot of VVT-torture. On the other hand, I agree with MM that we should be careful until we get to know these chips.