Yeah, I was kind of thinking the same thing.
When my mom and dad were 65/69, I bought them a Winbox simply because that is what everyone else has, so getting software and help would be trivial. That was 15 years ago and they are on their 3rd. Mom isn't here anymore but dad uses Skype, plays poker games (I send them game CDs) and such and he is in his 80s. We Facebook daily.
Sometimes "best" simply means what is most common, or maybe what you, the one who is going to be helping him, is familiar with. For him, the Winbox was handy because he could use it sitting down and the screen is big.