Increase in RMAH sales of Legendaries, Perfectly rolled 6 affixes Rares.
Gold and Gems will still dip.
GAH will continue to hyper-inflate unless Blizzard raise crafting/repair costs and decrease overall server GPH.
For someone who posts a lot you seem to be wrong quite often.
The economy in any game runs on the basics of supply and demand. High supply lower price, high demand higher price.
Patch 1.04 will, albeit temporarily, increase demand as more players return to play D3 for a while. Some of the returning players will stick with the game a while longer and want better gear. This will raise demand and the price will go up! In order to get the shiny new gear they want those players will need gold. Never underestimate the buying power of large groups of lazy people (the real economy is more or less built on this concept) to demand for gold will rise. However noone has a clue whether prices will remain stable for gold, or increase, that depends on how much gold is stockpiled and how much of it hits the market when the new patch and influx of new players turns up.
Given that GW2 is out soon that impacts D3, as well the WoW patch thats also coming in a week or so, some people will leave D3 and go play other stuff, especially a shiny new title like GW2, then they'll get bored of GW2, cry and bitch and whine and moan about it on various social media and internet fora and go back to playing what they prefer, some of it will be D3 and if the D3 devs make the endgame, item hunting fun for players it's playerbase will increase over the next few weeks compared to where it is now, thus demand will increase and prices will rise.
tl:dr yes prices will rise, noone knows how much by.
The gold economy on d3 is not hyperinflating atm (when we see vendor trash selling for million
s of gold then you can call it hyper inflated) it's inflating, no that's not the same thing.
In all my time playing I have yet to see one single "perfectly rolled" 6 affix item. I might never ever see one the odds on one dropping are vanishingly insignificant. Anyone who gets a perfect rolled item could probably sell it via a 3rd party site for the price of a decent car/small house (no I am not exaggerating here)