I don't see the point in making a spoked wheel tubeless, apart from avoiding sudden pressure lost due to a tube blowing, and easy repair without dismantling the wheel. Come to think of it, they are two good reasons.
I should have deleted this post but I'll leave it just to show how many time we find ourselves the answers to our own questions, just by phrasing them out...
Back to the original thread, those rims looks terrific.