If they can manage to make a dual triode that actually works consistently, it will be a great thing.
What surprises me is that they are starting with preamp tubes. They are not the most profitable tubes to make, because they last so long. Power amp tubes need to be replaced on a fairly regular basis, so that tends to be where most tube manufacturers these days spend their effort.
{edit}Actually, looking at their website a bit more, if they do this right, I will be (as a friend likes to say) fuckedstoked about this. It could be a really great thing.{/edit}
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"Cowards can never be moral."
M.K. Gandhi