I'd hazard that the current electronics ecosystem would be noticeably behind where it is today without Samsung. In tons of non-sexy ways, from end-products to internals, they have driven improvement (and dropped prices) in just about every electronics category that no other company has shown they have been able to duplicate, or willing to spend the massive R&D Samsung is willing to (11 billion?)?
And I consider the original Note the most innovative phone since the iPhone 4. Everything since the iPhone 4 has felt like incremental improvement from iOS and Android - except for the Note which gambled on a huge screen size and reintroduced the stylus back into the modern smartphone world. Certainly Samsung didn't create these individual features, but they were the first to bring them together in a compelling product. Now everyone is ramping up with a Note clone.
I also shudder to think where different markets would be if Samsung hadn't been able to challenge the leader. Certainly Apple would be happier and far more complacent without Samsung - and neither HTC, Motorola, Nokia, or anyone else has shown they're able to keep Apple on their toes from a comprehensive product standpoint (development, marketing, sales channels, branding, etc). Samsung shook up Sony in the TV world, GE and Whirlpool in the appliance world, Apple in the smartphone world, etc. As an end-consumer, I'm glad they're around.