notice how the production cycle is much faster with asic, gpu are far slower, if we stayed with gpu, the diff now would have been much lower, allowing many other people to mine
Can't really conclude that. There's only one data point for CPU and GPU. There were certainly more efficient CPUs and GPUs as well, though solid data on those is sparse because 1. ancillary hardware and 2. nobody really cared about efficiency back then, hashing faster and faster was the name of the game.Not much has really changed anyway. Bitcoin's PoW provides something of a positive feedback loop. If B has greater hashing power than A, then B effectively gets more funds than A, allowing them to invest in even greater hashing power than A. Laws of economy mean that this is not proportional between the two. E.g. if I have the startup capital to buy 100 GPUs, and you can only buy 1, I can already buy those 100 GPUs at a discount over your single purchase. I also get more reward, so by the time you can buy a 2nd card, I can buy - say - 110. By the time you get to your 10th card and have to deal with the heat, I've got a thousand and with a little extra investment they're churning away in professional racks. ASICs may have expedited things (and one can argue whether that's a good or a bad thing), but it was always going to go this way. I don't know if Satoshi actually hinted at this, or foresaw this, as it truly is now - but you're absolutely right that at least he didn't see supporting the blockchain as something that everybody would be doing.
As for the Uranus, even if that is not the 0.26 J/GH chipset, there is bound to be one debuted around that time based on the trajectory of the chart - that is until a technological wall is reached..
Anything based on BitFury or KnC's new stuff (if existent), or theoretically CoinTerra and HashFast's designs, or Coinbau et al, for example, may end up somewhere continuing that curve. The danger in including the Uranus is that some people will point to it, go "it's the most efficient!", and run off to buy one...when there's as of yet no evidence one exists and its manufacturer is unwilling or unable to cooperate in changing that status. The difference between that and the others mentioned is that you can't buy those. Unless you show up on their doorstep with some serious investment money, at least. ( Though I guess HashFast's chip design is technically still for sale, if you can convince DXCorr to part with it and then feel like fronting the money for fabrication and a miner design around it anyway. )Back a bit more on-topic.. true, BitFury hardware especially can be difficult to figure out given that a bunch of it was manufactured for large mines (some of the hardware popped up in threads here a few days ago, bought by private individuals off of mine auctions) early on and not so much for retail sales. Still, you should be able to goog some of the more popular completed miners and find a date-ish
If not, hopefully some others will be able to get you some values there. 
