The original dual lands like Underground Sea are prized because they give you these benefits AND enter the battlefield untapped
Starting Town Tournament Impact: Oh, nothing
Standard was the perfect home for that, but even Im most interested in building commander decks where I might be able to use some of those cards, but I can also use any other new card I read about that seems cool, and I can build for whatever power level I want, so I can make room for any cool card I want to
It does make it more likely that people looking just to collect sealed will probably be less likely to buy this latest wave
If your opponents ever create tokens, you get copies of them and more life drain
When most people saw Blossoming Tortoise on the Wilds of Eldraine spoilers, their minds first went to Commander, however it also has huge implications in Standard thanks to the new cycle of creature lands namely Restless Cottage