Considering people have only started getting poser5 in the last 2 days it's a little too early to start saying poser4 is dead, it will take a while for people to get used to poser5, so poser4 still has some life left, it will be months or even years before poser5 takes the crown off poser4's head. Converting your poser4 items to work with the new poser5 features would be a good place to start though.