SIM cards have already mirrored a lot of different technological trends. They got smaller as other devices got smaller, and their capabilities rose in proportion to the abilities of wireless devices in general.
Overall, it looks like some of the newer SIM cards are going to address many of the problems that people have been complaining about in more recent years.
People who rely on SIM cards all the time with their modern cell phones might have a hard time remembering the world without SIM cards. Imagining cell phones without SIM cards might be even harder, and yet cell phones predate SIM cards.
SIM cards were first created in 1991, which is well after people started using large, brick-like cell phones. Cell phones were not yet mainstream enough to truly support the development of convenient features like SIM cards, which have helped make telecommunications in general significantly easier.