The technology has been available for sometime. Like most say the problem is signal attenuation (due to degradation and distance). Also there is high cost involved in upgrading existing DSL equipment. Not to mention the further you are away from the exchange, the weaker your signal gets because it depends on active equipment. You might get better download speeds but upload speeds are still going to be pretty low.

It is a pretty good idea if TM is willing to invest in the new equipments involved.