All of targets player's creatures, lands, and artifacts come into play tapped.
Cards enter play tapped.
They do not come into play untapped and then immediately tap, therefore they do not trigger any effects due to tapping. This target is not changed even if this card changes controllers. It becomes useless but stays in play if the target player leaves play. Kill creatures as they come out. By itself, Kismet gives you a turn to deal with each card your opponent brings out.