Good question! And I don't think it has a simple answer, mainly because development takes time, usually more than people expect.
The certainties:
I include here Inleo and Splinterlands, both proving they can aim high, do it professionally, and with great results at times. Between them, Inleo I believe has a great momentum, Splinterlands still needs to build it up.
The exciting stuff:
I include here two things:
VSC and Holozing, each with their own characteristics and potential.
BUT... 2025 is only one year.
VSC is slated to launch in Q1, if it's not postponed, but there are no apps built for it, despite being revolutionary for Hive and in some cases for the crypto space as a whole. Building easy to use apps for it that take advantage of its features will take its time toll as well. I think VSC will be launched with at least one app built by the VSC team, so there will be something to start with.
For Holozing, last I heard they were planning to launch open beta in Q1 as well. We will see if that was postponed to Q2 or not. But open beta is not the full game, it will however be playable, rewards can be won / creatures captured, progress can be made in the game, and it will be open to everyone. Theoretically, they plan to launch the full game next year.
So, both these projects still have a long way to go to fully show their effects, in my opinion.
The interesting:
This is a project that often goes below people's radar, but I think it has and will have a big impact on Hive:
Waivio and at least one website using its infrastructure, which became very successful particularly in LATAM and Nigeria: The Distriator. It's true, the Distriator became popular because of the cashback, not because of its interface/backend.
Waivio continues to be actively developed, and it is interesting to see how resourceful they are in finding new ways to make their platform more useful and easy to use by the various website owners and their users.