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Ok, that is technological advancement, and the resource requirements at any moment in time may be less than they were before. I have little doubt that in 50 years time, my iWatch V10 can process 100k TPS with ease, but that is not the issue I was raising and your response also sidesteps away from your original statement which I countered.
My point was that as of today, it is not possible to achieve 100k TPS on a block chain, without using tricks and hacks, yet maintain the true nature of what crypto-currency is meant to be. The resources required to do that vertically is too great, in 10-20-50 years time it may not be the case, but everyone wants this now, not in 50 years.
Yes but one cannot justify crippling Bitcoin to the current technology for ever. Furthermore many of us are looking at Bitcoin for its future rather than present value. Even over the life of Bitcoin we have a significant example. The cost of sending 1MB of data at the start of 2009 is the same as sending 21 MB of data in mid 2016. It is called Nielsen's Law
http://www.nngroup.com/articles/law-of-bandwidth/To come to the VISA example should credit cards not have been launched in the 1940's because it was not possible to scale to the levels of the VISA network of today with the punch card and tabulating machine technology of the day?
Edit: One the subject of the iWatch V10 it could easily process 100k TPS or more in 50 years, but only the 100k TPS that is approved by the censor board at Apple. This is because of the DRM in the device.