This is just a development on the great HDMI cable con where people will try to convince you that a £100 hand fettled by elves HDMI cable produces a vastly superior picture when compared with a cheap £2 alternative.
In this case the Elves must be using Mithril rather than the much less precious Silver hence the almost 100X price hike.
Actually the whole Mithril concept could have legs, mythical materials at mythical prices with mythical benefits.