Oh, I don't doubt, that Tesla can do it :). I just think it is interesting that the specs to the roadster point to a clear and significant increase in battery density. The Model S went from 80 to 100 kWh in 5 years, which is a nice increase but much smaller what they seem to plan with the roadster. And it would be exciting for electrical cars in general, because with that increase a more realistic 100 kWh battery changes from being something you can barely fit into a rather large Model S to something which should fit easily in much smaller cars designed for electric propulsion.