With those old Vespa's, a big part of the appeal was tinkering with that little motor behind the side fairings.
Tuning the engine/exhaust note too.
A silent... electric... Vespa... loses alot of appeal for me (thinking nostalgia).
However the young hip guys and girls will prefer this, over a noisy motorbike, for its clean appeal (no smoke, noise, fuel, even servicing will be no hassle).
That's a nice looking bike though. Quite sporty.