It seems that Xiaomi’s MIUI 10 will be revealed on the same day as the Mi 8. The news came via the Mi user interface’s Weibo account.
Xiaomi was rather quick on following up MIUI 9, considering that the UI only became available towards the end of 2017. Sadly, other than the announcement date, nothing else was revealed. We’re just going to have to wait on launch day to know more about the new additions to the UI.