And this is where you are wrong Bov. The bolded parts are correct. Anet is releasing a new dungeon. Anet is releasing a new set of upgraded gear. But the next part is where you are wrong. Anet is not requireing that you have that stat to do the new content. The content is doable without the required stat. The content has a higher difficulty which the stat is needed. This is the difference between WoW's Raiding system which limits players who dont have the gear from doing any part of the raid, and GW2 which still allows those who dont have this special stat to do the dungeon.
In order for WoW to do the same they would need to get rid of the gear requirement for LFR and then the concept would be the same. Raids would then become accessible to all players while Normal and Heroic versions would become Optional content for those that want to keep progressing their gear. As it stands right now LFR is not tuned for a level 90 in full greens but for a level 90 in full blues, i say this because there is a ilvl requirement to even gain access to the LFR queue.
So again FotM will allow all players to experience the content. Those who wish to do harder versions of the dungeon will have the opportunity to do so by upgrading their gear with this special stat. This special stat however does not affect players outside the confines of the dungeon. And those players not doing the FotM dungeon wont feel "left behind"