Although I am completely anti electric vehicles, (except for city centre use), I would say that a field of 50+ electric bikes would still be a spectacle. Yes, the sound and the smell would be gone, but watching the top men (and ladies) through (say) Gorse Lea would still be a sight to behold. Only problem is that the best entry so far has been for about 10 machines!!
I still hold out hope for the good old I.C.E. I am reasonably confident that someone will come up with either a 2 stroke or a 4 stroke engine that has a better carbon footprint than an electric motor, especially when you consider the battery.