In all honesty, the infinite guitar isn’t all its cracked up to be anyway. You can achieve very similar effects with an ebow and effects pedals.
This is why I don't understand placing so much importance on Michael Brook. It's just a different way of achieving an effect that plenty of people have used before and since. It's in Heroes, a very popular song that's over a decade older than WOWY, though it was achieved through complicated studio trickery.
Yes it’s not anything new, really. I would imagine Brooks Infinite guitar that was used on WOWY has a unique sound but it’s not something that can’t be easily replicated elsewhere as heard on the live rendition of Radioheads National Anthem.
In fact, edge has used an ebow on live versions of WOWY.