Sigh, now we've stuck in a world of Google or Apple. I recall a world where each phone had itself own OS, or firmware. Every phone was different. I miss my Lumia and my Sony Ericsson k700i and just the simplicity of texting.
Android phones are already like that. Samsung phones will keep pestering you to enable Samsung-specific features and the UI has been rewritten by Samsung.
And the world would be a very boring place if everything everywhere looked identical