You could easily say your NFT will unlock an equivalent in my come, jump ship and give me your eyeballs!

True, but then again that may have to factor into the price. A game like Eve has been running for years, if not more then a decade. The longevity of your game will just increase the price. But yes, as some point your NFT may go to the graveyard unless someone else picks up the ball and says their game will support it.

Its the wild west, may the best win.