[tangm]

I think the progressive loading feature of FLIF/FUIF/JXL would be really interesting for WebGL. WebGL games already have asynchronous resource loading and incremental image decoding/texture upload just by virtue of using the available APIs. One could get a pseudo texture streaming effect by default (although no unloading of textures...)

[twotwotwo]

The fancy new lossy mode has some incremental loading too; could be interesting for both.