Not so keen on the amount of Narcissus and Nostromo I'm seeing, but they could surprise me.
The Alien series has always looked for upcoming talented directors, Ridley, Cameron, Fincher, perhaps this is a new way of finding fresh blood.
Regardless, I hope we will get some good short films out of it. The Alien prequels have a better track record with their virals than the mainline entries so it's not like it would entirely be unheard of.