I believe the flexible ability to mine different algos/coins is what people are missing when thinking of buying this ETH ASIC. Don't forget that you can mine new coins on their first day of launch and earn more profits than you ever would once they become mainstream. Being stuck mining ETH or ETC for all eternity is not such a good thing really.
better to buy those coins than having a gpu or asic miner for that matter, mining is overrated as long as price of coins are cheap which is at moment.
spending any amount on miners at moment is pointless cause you can get x times the money invested if you simply buy the coin.