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Some information I am gathering on the tech demo. It took 3 months of development. To clarify that, for a game that would take 2 years to develop, that is 1/8 the time on one cut scene .For a 3 year dev cycle that is still 1/12 of the total cycle on one cut scene. Tim Sweeny says in an interview about the tech demo that disk drives have no future in entertainment devices. that suggest it would at least be difficult if not out right problematic to do this grade of work with disk based media. To run at 1080p 30 fps it took 2.5 teraflops. Unreal engine 4 is not scheduled for commercial release util 2014. The tech demo was dependent on direct x 11. I cannot find a good source that says what hardware they used to run it. I am finding that it was either 3 gtx 580 or one gtx 680. Is there anything that you would like to add or correct this this?

So far it does not look like that grade of work would be viable for the majority of the industry.