No. Enovix beat them to market (seemingly by just a few months) with a 100% silicon anode. These two companies will change the world, the only question will be is it Enovix (which makes whole batteries) or Sila (which only makes anode materials).
What matters is how good your batteries are compared to price and at what scale. What combination of silicon/graphite or other materials is used doesn't really matter.
I for one am more exited about Tesla mixing metallic silicon with graphite, rather then these complex composite particles. I think that will be much easier to scale.