I'm a pianist of 20 years. I'm fine with manufacturers making these products. I'm fine with new repertoire being written for them too. There's just no getting around the fact: large hands are an advantage in piano music. If you can reach a 10th easily, that's great. If you can reach an octave very easily, thats very great. If you can't reach an octave easily, you will never master a large fraction of passages in Romantic and later music.

For instance, try playing the octaves in Nocturne Op 48 No 1 by Chopin with small hands...far harder!