I believe the difference is that gacha introduces an element of chance, so you spend an in game currency to buy a spin of a wheel where you may get different rewards. Microtransactions could be something like “spend $5 and get this new skin”, it’s a guarantee. Gacha will be like “spend $1 for a 10% chance at this legendary skin, spend $5 for a 70% chance, etc etc”
In many ways I think rising prices could be great, but in reality, they won’t be. With the technology available today, we could have even cooler games than we do, and more games, and more great games. We could have more diverse and experimental games. It would be lovely if solo indie developers were able to make a living from making great games, rather than basically needing to chase a dream akin to getting drafted into the NBA. Game developers are seriously underpaid, it would be great if they got paid as much as other software developers, especially since their work is equally complex and usually more stressful.
In reality, rising game prices will not help with any of those things, and will just make the C-suite richer. The one silver lining is that this may allow small indies to start charging a more livable realistic price for their games.
What’s always upset me about this is that I don’t get to see the illustrated diagram. I want to see the diagram.