Quite a few of that list still exist (and some were released, even). Big chunks of American Hero are playable, same with BIWN, same with Brett Hull Hockey, I've seen someone playing LiveWire at a JagFest UK. We all know about Phaze Zero, Tiny Toon Adventures and Painter. There are mockups of Jack Nicklaus Cyber Golf. I have Virtual VCS. So really a fair few are accounted for!
Rollcage would have been awesome, same with Phear (rumoured finished but Nintendo got exclusive rights when they recoded it as Tetrisphere for the N64). It's probably a blessing some of those got cancelled though, Lester the Unlikely was awful
Stone