I really hope that "Can be updated OTA" will actually mean "WILL be updated OTA"
I once bought a Chinese android radio for my car, it works fine, and it was also sold as "OTA upgradable" but to this day, 5 years later, i am still awaiting the first OTA update.
"it is possible" does not mean "it will happen" apparantly.
I once wrote them, and they said "No, the radio would not be able to run any later versions of android"....After which i found someone else, that made an alternative version for my radio, and i was able to upgrade it from android 4 to android 5.
Also there were bugs, that were reported, but never changed.
It felt a lot like "We will promise you whatever but not actually deliver when we got your money"
I REALLY hope this is not the case with the ZS