I hope it's $200 for the Vegas owners. But if a new suite with Samplitude was offered for say $350 I jump on it. I don't burn DVD/BR but do miss have my video and DAW working together seamlessly. I am looking forward to an increase in the ability to use every once of my system's power to drive rendering and working on the timeline. And while Vegas has some great tools for sound editing, sound creation is such a big part of any video/film that having a good DAW with seamless integration would be a competitive advantage for the selling to the "one man band" shop.
I wonder how much advantage in speed one can get with a current system. Can we expect to see 100% usage of GPU RAM, System Ram, and band width on SSDs? If so would this mean that 8K could be come a usable standard by the next Olympics?
As a retired person with a video/music studio I am somewhat limited in how much I can spend or how much equipment my studio space can hold. Trying to find the sweat spot where performance and cost is maximized is of course hard. And I guess that what has me excited about the performance increase in Vegas 15 as while not exactly free lunch it appears that it is one way to really leverage the current tools I have. Anything that gives more time is for me a worthwhile investment.

