A new horn is brewing in the cauldron?

This seems more like it...

He must know that viewers would be curious, so it must be a tease for an upcoming model.

Admittedly, I have never listened to Tekton speakers, never even seen them in real life. Hopefully they sound better than they look, to me they are hideous. For some reason they come off as cheap.

That massive horn 15in bass array looks like a HT speaker. It's very sterile, monolithic, and industrial looking. Again, hope it sounds better then it looks. 

The MF/HF horn in the background does indeed look like the B&C ME464 horn, which is usually mounted with or intended for the B&C DCX464 coaxial compression driver. Being there’s a dedicated tweeter horn just below however he’s likely using a different driver for the large horn (the DCX464 isn’t cheap, nor is the corresponding horn itself). 
With regard to looks: they’re mostly deceiving, and luxury finish only, only adds to the price. 

Then and than are frequently confused, as above.

Way too frequently…