"The same thing could absolutely happen to Android or iOS in a decade, but who knows? They could be replaced by something revolutionary," he added.
Especially for smartphones, the longer-term future is hard to predict, as new wearable devices emerge such as Google Glass or watches with computing power that can work wirelessly.
"In 10 years, anything could happen," added Llamas of IDC.
"Just look at the last five years. There's been iOS and then Android and Tizen and Firefox and BlackBerry 10. During that time, WebOS came and went," he added.
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