look here for typical amounts https://en.wikipedia.org/wiki/Overscan#Overscan_amounts
In your case we see 2-3% (depending if you are in 720 or 1080).
My rule of thumb is, I assume that 3-5% on each side are LIKELY to be lost due to overscan and plan accordingly. Meaning, don't put stuff you care about there - but keep in mind on some TVs those edges will be visible so don't leave them contrastingly empty either
Thanks VERY much for the reply AND information - I really appreciate it
So, are you saying that on every project you do, you account for 3-5% area around a given project's design for content?
I'm going to ask this next question, though I realize you probably would have pointed it out: Is there a way to programmatically determine this safe area of what is actually viewable on any device?
Thanks again for your help,
PS> Of course this is my first venture into a Roku (TV) project, so any silver bullet-type tips/links are very much appreciated