K.M.
In some cultures the bride opens the gift when the guest comes/presents it to them, much like a hostess would a hostess gift. I think it is personal and classy to greet your guest, accept the gift and then "Ohh and Ahh" over it right then. You can have a display table for the gifts once they have been opened. To be honest most people only want to see the face/reaction of their own gift being received and care little or not at all about the rest.