This is exciting. You should make this and eat it.   You should not tell people (non-vegan people) that it's vegan until after they're wow-ing about it.  
I was apprehensive about trying to do a non-dairy cream sauce.  I'm trying to expand my repertoire of vegan recipes, not because I'll ever go cheese-free, but because you never know who you're going to end up cooking for.  Actually, I do know, one of the friends I cook for (used to cook more for, got lazy, I suck) is vegetarian and dairy free, and frankly, eggs aren't exciting enough to me to call her anything but vegan.  So I like to try different things and see if we can get by without milk.  But this dish isn't about getting by, this dish rocks and I don't see a reason to make dairy cream sauce again.  
Anyhow, back to my apprehension.  1.  I like cheese and stuff and 2.  I tried to use the cashew cream a couple of days ago and it's was disgusting.  I mean like, spit-it-out-and-try-to-forget-it-ever-happened disgusting.  But maybe that's because I tried to use it raw in a cold sauce, in lieu of sour cream, because this time, again, fantastic. 
 
























