Certainly a better bit of kit than dual GPUs that need their own PSUs etc, would certainly notice it more, price and functionality isn't quite there for me now but this is obviously the way that storage is heading, they are getting there with the lifetime of flash so hybrid drives arent far off.
Not an unfair advantage, it's available to everyone if they have the cash, and if you dont you can just look at benchies that dont use them.
With top-end benching becoming more expensive at every step (you need the latest stuff = top dollar, dual/quad GPU, PSU to match, LN2/cascade etc) i think people are more and more looking at "leagues" of benching, so that a few people with the budget can go for number 1 overall (like the top premiership teams), and then various divisions based on what you want to look at, whether that be by cooling, CPU type, HDD setup, single/multi GPU.
I like this type of outlook, as it means it is about doing what you can with what you have, you focus more on and are happy with what you have and how far you have got it rather than the expensive eternal chase. Seems a bit more fulfilling to me.
Apologies for the long-winded post :$
G