One problem with the new priesthood is that they have no answer to the nagging question of what becomes of us after death. So far, all they have to offer is head-freezing technology.
If by "us" you mean our consciousness, or "soul", I don't think science has the ability to answer that with hard data. But why do you think that there is an "after", after death? People of many religious persuasions think that there is an "after", and it seems hard to believe that there is not an "after". But bottom line, if our consciousness is contained in the neural structure of our brain (I think it quite obviously is), then after you're dead, then you're dead.
Sucks doesn't it?
It's no wonder people flock to religion even when they should know better.