Well, from what I understand he's going to exploit the app similarly to tubehax. It'a not haxchi. It will more likely be somewhat similar to browserhax than contenthax.
It would be cool if:
1- it's around 100% stable.
2- it's not blockable without updating the software.
3- works on latest fw
Otherwise, it would just be another browserhax method, having the same stability issues.
But even then, he isn't really giving me much confidence on his approach from what he wrote on twitter. Time will tell though. Let's see if something comes out of this.