Fingers crossed. Having another competitor will keep the others on their toes. Currently, Microsoft and Google are having a cold war over tracking and ad revenue against each other, Apple is slightly struggling keeping up with the ever changing web standards while Mozilla is looking for the next worst way to monetize their user base.
From what I see, it looks pretty similar to what the Servo rendering engine crowd is doing. While I see no blog updates from them since July, even though their github is pretty active.
At the moment, all they have is a few screen shots and marketing claims. Since they are using SpiderMonkey, I hope they make this open source.
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