Without WWII, US will still be the leader in computers, but without a WWII or Cold War as we know it, development will be slower in miniaturization.
There are so many butterflies, there wouldn't even be a Minitel.
See, you had a beaten France trying to regain leadership in the world in many Technological areas, under DeGaulle. This timeline, he's a unknown Colonel who retired from active service, accomplishing nothing of note other than some writings on the use of Tanks that almost no one outside of France would have read.
He pushed for a lot of distinctive French standards, like Color Television, for 'National Grandeur' for the sake of being different from the US and UK
Without him, French development is completely different in Technology.