A lot of Gretzky's records that are not listed there are pretty unreal. 50 goals in 39 games, 92 goals in a season, 215pts in a season, 1,963 career assists, 163 assists in a season.
I don't think Gretzky's are untouchable, to be honest. Right now, they're astounding. But the game evolves so quickly. I'd say his totals could be broken within the next 15 or 20 years.