No internet means certain crucial things would need to have been different in the late 80s and early 90s (perhaps a still ongoing cold war, or hackers become enough of a security concern very early on for governments to shut the whole thing entirely). Thus, we can't extrapolate almost nothing into the present because everything would have been changed as early as during the SNES / Genesis days.
The Cold War was over before the internet became well-known to the general public. The Soviet Union had dissolved completely by Dec. 1991. The World Wide Web had only come into existence mere months earlier. I doubt the absence of a publicly-available internet would have changed anything about the outcome of the Cold War. Geopolitically, I imagine the 90s wouldn't have been much different without a public internet.