The station I watch most often for local news, WAVY-TV, out of the Hampton Roads area of VA did a test Tuesday morning. We made a point to be up and switch all TVs to that station at the appointed time. The result is we do not need converters boxes as all TVs received the digital signal just fine.
I seriously doubt anyone with a "rabbit ears" set top antenna will fare any better unless they are in close proximity to the stations they want to watch.
Hahahahaha. As I suspected! I am not doing anything and will see what happens to my humble rabbit ears RCA set on 2/17/09.