It seems you did not really take into account the growing scarcity of materials. Whilst technology may be able to create new materials that don’t currently exist, tt still represents a problem. From about 2040, at the current rate of usuage, some metals will not be availabe, such as aliminium. By the end of the century the list of non availability will be long. Unless technology becomes entirely organic, it will simply run out of raw materials

An example is that the known resources of Lthium, much used in batteries. As of January 2010, the USGS estimated world total lithium reserves at 9.9×10 to 9th kg (economically extractable now) and identified lithium resources at 2.55 × 10th kg (potentially economic). Most of the identified resources are in Bolivia and Chile. World lithium production is currently on the order of 2 × 10 to the 7th kg per year. http://large.stanford.edu/courses/2010/ph240/eason2/