When I bought the Wii U for my kids, if they got to the end of the new Super Mario world and I had to go pay $N.NN to unlock the rest I'd have a really bad taste in my mouth.
What about at least including a couple awesome titles with the console? They are all around $1 to $10 (ish) right? Heck you could include 4 A-list titles where I only get ONE with a major console.
Just saying... nobody is blinded by the "free to try" idea. All that means is that I will need to spend MORE money before it's fun.