Someone will forget their laptop, or won't have wifi, or the power will die, or the link doesn't work or won't have the right pdf/doc reader, or will respond to

Someone will forget their laptop, or won't have wifi, or the power will die, or the link doesn't work or won't have the right pdf/doc reader, or will respond to that notification they just got distracting everyone with their clickity clack, etc. Making the presenter bring everything needed to have a distraction free conversation is a feature, not a bug.