I think having an implementation isn't needed. However having an implementation proves that the idea is feasible and simplified verifying it. Also you don't ha

I think having an implementation isn't needed. However having an implementation proves that the idea is feasible and simplified verifying it. Also you don't have to be in the meeting in person, however a paper without author or somebody else who can argue for it will have a hard time to get the attention considering the number of papers in the queue.