I wonder what he thinks about it having more than 640KB of RAM, which as we all know is the most any application will ever need.
Of course, Gates never actually said that 640KB was all anyone would ever need.
What he said, at a college speech poking fun at himself about fifteen years after they boosted memory support from 64KB to 640KB, was that they all thought at the time that 640KB should be enough of an increase to last for the next ten years. As he ruefully commented, it turned out to be only good enough for about half that time.
If you were around in the early personal computing days, you'd probably have thought the same thing. Heck, a lot of people thought we'd never need more than 100MB of disk space.