This isn't new, selling new chipsets is a big business for Intel & planned obsolescence arguably a bigger one!There is nothing significantly new in the supposed "new" chipset. I feel one of the main driver for a "new" chipset is because existing boards may not keep up with the power requirements of these new chips. At the top end, where the boards are overbuilt, perhaps, but not in the mid or low end.
For me the worst part about getting this new chipset is that I believe there is no upgrade path ahead for it. I read apparently the next gen Intel CPU is going to require a new socket. So this 4xx series chipset is an upgrade dead end.
The performance hit will still be there, people need to get this out of their head that hardware fixes will not result in any performance loss!The security flaws discovered to date should likely be fixed at the silicon level.
No you are not missing anything, this "new" chip is basically a Skylake on steroids.
Extra cache, besides higher clocks, being the biggest difference.