Minor nit: Betamax is a standard, but flawed example. The original betamax cassettes only worked for 1 hour, but movies last 1.5-2.5 hours. They eventually fixed it (at the cost of lowering quality), but too late.
And it's another example of a win not being necessarily what yo hoped for. Ok, Sony didn't get a Beta machine into every home as they had hoped, but they got at least one into every TV station.