I think you're all deluding yourselves - there's no way Ridley will go back to the low budget creature-feature stylings of Alien, no matter how incredible he made it look. Most of that movie was about atmosphere, more due to budgetry limitations so I understand.
I'm sure he'll be equally obsessed with suggestion and tension - but the universe is his to play with now. We have to accept this is not 1978, gargantuan strides in filmmaking have been made, he's using unbelievable cameras, IT'S AN IMAX PRESENTATION...it's just not Alien anymore. As promised, this is going to be something entirely different, an epic from the same universe, but a new beginning. He promised us lots of practical effects - but planetoid landscapes an skies are going to mostly be cgi tho, no matter what.