There is nothing magical about ASIC's. They simply perform one or two tasks very efficiently. That's GOOD for scrypt coins. the fact that people are developing them means that this algo is NOT going away.
SHA-256 ASIC's are relatively easy to make, whereas the Scrypt algo adds in a very memory intensive additional task. Basically, this means that you need ram as well as ASIC's, and ram is more expensive to manufacture. However, it's also common as dirt. There was only one way that ASIC's wouldn't come to scrypt, and that was the failure of the coin(s).
I am going to make brash statement... GPU farms are dirty, destructive, resource-hogging, environmentally-unfriendly, inefficient, expensive disasters waiting to happen... that is coming from someone(myself) who is well known among friends as a hard-right wing, petroleum guzzling, capitalist pig!
I own and maintain a 15Mh/s system... it requires 7500KW of power, has turned my nice cool basement into the hottest room on the property and needs regular maintenance and repairs... all for only 15Mh/s.
We have to embrace ASIC's... it is the only way forward. GPU farms are simply too wasteful.
You made a post somewhere in this thread about a steam/solar/generator/mining system... nearly impossible with a GPU farm... even the most efficient 3x270 rig requires 600W 24/7 for only 1.3Mh/s. But with a small, efficient ASIC miner, you could run a 1 to 2 Mh/s system with a solar panel and wireless connection.
Earthcoin... GPU farms are not earth friendly... if that is something you are concerned about.
You're right, it would be good publicity for earthcoin, as all of those solutions are either non polluting or a very small footprint. The batteries that I favor are deep cycle batteries such as used in golf carts. They are old tech, and if you take care in their maintenance, non polluting. The rest, there is some pollution in the manufacturing chain, but not much. Small scale hydro can be done with water wheels turning automotive alternators. They are made to work under variable RPM and find their way into landfills and smelters in great quantity. As far as I'm concerned, that's a huge waste of readily available resources.
EDIT: Typos.