Congrats to the Seller!
I believe this is more of an anomaly than the norm for .TV sales.
An obviously motivated buyer and targeted domain/keyword = nice sale.
Now, IMO, .TV has always been under-valued, generally speaking, but hey - this is domaining - one persons garbage is another persons treasure.
I'll give it 5 more years, with greater Internet/TV convergence, for .TV to gain increasingly stable sales into the $XXXX & $XX,XXX (assuming the Second Depression doesn't take afoot with the Greed Bubble bursting and there being a Moral Correction in the world of commerce atm).