Enchanting changes on PTR: (remember these might changes again before going live, but this is likely to be close to what happens).
http://www.mmo-champion.com/index.php?topic=32802.0Basically, what it means is that a lot of recipes which didnt use dream shards now use dream shards. So there is a good chance that the price of dream shards will go up a bit in the weeks following the patch. (still a lot hitting the AH due to heroics etc, but would expect them to go up a bit from what they are now).
A lot of recipes that needed a lot of Greater Cosmic Essence now need far less. So there is a good chance that the price of Greater Cosmic Essence will plummit in the weeks following the patch. (currently 20-25g each; I'd expect them to drop to around 10-12)
Many recipes which needed 20-40 Infinite Dust now need far less. So I expect the gravy train that is infinite dust will hit a wall and they will (sob) drop from around 5g each to (guesswork again) 2g each within a few weeks after the patch.
Other things which will be affected by this are the general price of L73+ greens. A lot of AH players buy these up to DE and sell the enchanting mats so I guess these will drop in price after the patch too.
My favourite was to buy hundreds of eternal earth and/or eternal shadow for 5g each, send them to my JC to make hundreds of Stoneguard or Shadowmight rings, send them to my Enchanter to DE them all, then make a few K from selling on the enchanting mats at a good profit. I know I wasnt the only one who did this, so I also expect the price of Eternal Earth and Eternal Shadow to come down a bit in the weeks after the patch.
Here ends my market report for today :-) (all guesswork ofc - but it will "probably" happen)