Your technique, rich in details are superb. By using somewhat faded colours it rather make one think it really are one old painting we see here.
Many details seen are of a kind that actually existed: The horse pulled cart, the barges and the building at far left - such buildings remain today from that age. (I even got some buildings with that colour scheme here locally)
The steam bus (or it it supposed to be a tram?) the train in the rear and steam powered tricycle also reminiscent of things from the era.
With those realistic elements seen, at least I tend to accept the Jules Verne'ian airship in the sky. if not as realistic...at least find it an believable part of the painting.
I do not give full points on impact, the reason are that I do not get a clear sense of distance for the object in the rear. The chimney at far right are in fog or smog, also the farthest part of the street seen between the two vehicles pulled by horses. Yet I get the notion that the steam zeppelin and the associated tower are closer even though the railway station are in front.
While writing this I also found out the other detail that nagged in the rear of my head. The brown colour of the water which do not have much reflection of the leaden sky above.