Well the DAO may be a failure but ETH certainly it's not. The problem was in the smart contract code (not in ETH platform per se). No ETH was stolen because there were security barriers installed from the start and Vitaly and crew seemed to respond as fast as they could, so that's what affecting the price right now, it was a major hiccup but nicely handled.
I would say the DAO has no future, it was already chaotic to begin with and this may have been the last nail on the coffin but you never know, maybe it hangs around and recovers.
Eth suffers from the same problem the DAO suffers from - Turing complete with an extremely large attack surface. Not only that is they are doomed either way now . If the developers and miners perform a HF and seize the properly earned coins(remember code is law in smart contracts and technically the "hacker" can sue if a HF occurs) , than they open themselves up to regulatory exposure and will need to hire a bunch of lawyers and at the same time undermine the trust in the network. What happens when the FBI knocks on the Ethereum foundations door and asks for another soft or HF to disable or freeze assets on a naughty smart contract? If they don't HF than there is a "hacker" with 3,641,694.24 ETH on a coin that is going to PoS algo . Good job.
You mETH heads really have convinced yourselves that we are simply attacking Ethereum because we are jealous when we have been around long ago and decided to pass on the IPO specifically because these security concerns. Ethereum will literally have to remove it most special feature - being turing complete - to become more secure...good luck!