and for arguments sake, 1 STEEM is worth the same as 1 ETH now ($13 each) or more
That's what I said. I used it as an example of what we might see in 3 years which is reasonable. It could outdo even those numbers. We're going to find out. Social media with wide adoption doesn't die easily.
With the inflation rates - no way!
Please tell me how many steem are going to be distributed March 2017, and how many users exactly will be on the system? You can't, because it is in the future. Also, can you guarantee that the amount of steem created each day is not going to change, and they will distribute less? Again, you can't because it's too early to see that yet.