Ethereum is in a long term price channel on the ETH/BTC chart that has it reaching around 0.4-0.5 BTC sometime in the next few months. Given the amount of catalysts that are coming up I don't see this as being too farfetched. Casper, sharding, plasma, first gen dApps launching, futures/ETFs, raiden network, etc. could all launch or make huge progress this year. In terms of developer support no crypto project is even in the same stratosphere as Ethereum right now.
I go into more detail and explain the technicals in this video:
https://youtu.be/w5tm64qqIyg. Let me know what you think.
I think you just made the case for $10k ethereum insead of $5k, being that if it reaches 0.4/0.5 btc it will probably be closer to that figure. You make some very valid points and it's hard to disagree with them, lots of these updates can greatly enhance the ethereum network and really take it to the next level.