(Disclaimer: The following information is opinion and not to be considered fact)
I think that looks pretty good actually. With a carbon content below .90 and fairly low chromium, this should have a nice fine grain to it. Tungsten and Vanadium don't really grow big grains when temp is controlled, and I like that the Tungsten and Vanadium are balanced. When it comes to carbides, I find that Tungsten produces a stiffer edge less prone to rolling whereas Vanadium will increase wear resistance but not do much for the rolling factor, hardness aside. Any steel with a lot of tungsten feels like it gets sharp faster because the edge stays straighter while sharpening. The tradeoff is this makes a knife chippy.
There's just enough chromium to make this much less reactive than your standard carbon. It will patina I'm sure, but it should be pretty mild.
I've never really paid attention to how Molybdenum affects a blade. For some reason I always overlook it and I know it plays a big part in some steels. The chart says it works the same as Tungsten while controlling grain. This should produce a stronger steel.
My opinion is that this should have a little less, or near, the wear resistance of VG-10 but have much better toughness and better sharpening properties. This is not stainless and will act more like a carbon. Expect it to take a fine edge. 15 degrees would be good for this stuff, not sure it would support crazy geometry. You need to get above 1 percent carbon to get a good edge below 15 degrees per side IMO, although at 62 rockwell I'm sure it might be a ringer.
Until we get some, it's all speculation! Hitachi has an incredible reputation, and I'm sure this is going to be a great little steel.
Purity and manufacturing process have just as much to do with steel as its composition. The fact that Hitachi is making this is why I think it's going to be good.