Yep, really want to see Anandtech's take on it. It's going to blur the line between memory and storage - at those speeds frequent writing to the swap file probably won't matter. A few people might have to eat their words when the reviews are out.
There's still a lot to be done before SSDs can truly rival with memory.
But isn't this the ultimate idea behind NVMe? By using PCIe in parallel it gets to the point where you can rely on nonvolatile memory to be more of a system workhorse than merely a storage system. Apple seems to have an idea of where they want to go - just look at the last two iPhones, the 6s and 7. They've had around 1/2 to 3/4 the amount of RAM of other flagship devices while having stupid-fast storage and in real-world tests they outperform their competitors for load times and responsiveness.
I expect that will even be a likely third party snap on product given the upgrade in what the new ports make possible.