I would disagree here. By itself the 'you are cruising at...' could have been quite funny, but the problem is it's not by itself. It's accompanied by branding the cablecar as an 'airline' (it's not, it's a cablecar), sticking 'emirates' on the station names even though there's nothing remotely around either station to justify it. In my view that's gone way beyond humour into the downright misleading, and for me, that stops it from being funny. I'll grant that it's highly unlikely that any locals are going to be actually misled, because people who live locally will know about the cablecar anyway, but it's not beyond the bounds of plausibility that a foreign tourist who knows little about London could be quite confused by it.
I don't mind funny, and I don't mind advertising. But when you see something that is definitely advertising, but which has been branded in a way to try to make it look like it isn't advertising, and twists facts round in the process, warning bells ought to be ringing. For me, the dishonest way the cablecar is being marketed is definitely a disincentive to my using it. (I probably will in the end out of curiosity, but it'll definitely be later than it would've been if the marketing had been honest).