In advance of Apple TV's big announcement next week, other folks are announcing their new streaming TV boxes. Comcast announced Xfinity Flex
today, a video streaming box.
Xfinity Flex looks and acts like a set-top box, but uses Internet, so it avoids all those pesky cable TV rules. But emergency alerts aren't mentioned, even in the fine print at the bottom of the page. I expect there are none.
I still hope a reporter asks Apple about emergency alerts at its big event
on Monday. Apple TV streaming may be awesome, as that tornado destroys your mobile trailer park.