Depends which billion you end up with, who's in charge and how they are distributed.
Also, more people permit economies of scale that allow developments that would be unfeasible or impossible with fewer end users. You'd eventually have had personal computers and an internet, but it would have taken longer. A lot, lot longer. But, hey, the pony express worked just fine, and dentistry wasn't all that much more painful than today, right?
Economies of scale was a part of the old industrial system, like big cities.
Today, with CAD/CAM and rapid prototyping what is available are products as individualized as under the old craftsman system at industrialized prices.
Your thesis is perfect for the last millennium.
So9