it doesn’t necessarily mean it’s for a logo. I actually assumed he wants a similar effect for some in-game magic (otherwise yeah, why bother making it realtime)
btw such vector field particle effects were one of the key points when showing off UE4 back when it was first unveiled. the key part was the GPU particles feature which allows hundreds of thousands of particle sprites to exist without killing your CPU (but you can easily kill your GPU with overdraw cost)
now that the dust has settled these effects seem nothing special really. it’s something of a gimmick and can still easily kill the GPU, and I have yet to see a project that benefits from it in a significant way. it’s still the key part of the UE4 particles demo project btw