Please ask Ohad. Honestly he is tight lipped about his timescales. I do know an alpha release is planned, and a whitepaper is planned. I don't know when it will be and last saw a draft over a month ago so I don't know how far from complete the whitepaper is. I can say, Ohad never stops researching, and I helped him for a time.
The potential based on theoretic basis alone is great. If Ethereum is over 30 billion, and if we assume conservatively that Agoras can reach 5-10 billion, with a very small amount of coins with only 42 million to ever exist, then we could see very high prices in a relatively short period of time.
Prices in the hundreds of dollars if Agoras is successful. But Tauchain would have to be successful first and that is the unpredictable variable. If Tauchain is successful then it will become obvious whether or not Agoras can be successful. So do what you can to make Tauchain a success if you want Agoras to be a success.