To add weight to your skepticism the article states, "Eventually (in another 10 years or so), li-ion batteries could be replaced with li-air batteries." !0 years is a long time-frame.
Exactly. 10 years is way past the Technological Event Horizon, which is about 2 years.
Which means that unlike, for example, memristors, lithium air batteries most likely won't happen, and if they do happen, their happening will be a consequence of other research.
(Which is an argument why most research should be fundamental and open-ended, i.e. not directed towards specific outcomes.)