It's funny, because Atwood wrote in her essay collection, Moving Targets, that "the science fiction label belongs on books with things in them that we can't yet do, such as going through a wormhole in space to another universe; and speculative fiction means a work that employs the means already to hand, such as DNA identification and credit cards, and that takes place on Planet Earth."
Atwood's imagination is one thing i would call as talent. It is very difficult to value what is the edges or boundaries of imagination. Too much could be exaggerate, too little is only prediction.