If you transported Apple's website back to 1993, I have no doubt it would end up looking exactly like this. Especially that beige menubar. HyperCard, anyone?
The mock-up is the work of RetroMacCast listener newtonpoetry, who's really nailed the details—as he did in his re-imagining of Apple's 1983 website. Just look at how magical and revolutionary that Newton is!