I mean, foldable phones and tablets have been discussed for decades with expandable displays being in sci fi for pretty much forever. Most of Apple's 'big leaps' have been by finally producing something that actually works. There were smart phones before the iPhone. There were tablets before the iPad. There were bluetooth headphones before the AirPods. However, Apple nailed their implementations of these products and that's where Samsung has largely faltered or relied on copying the perfect mix.
Samsung had smart phones before the iPhone but they almost exactly copied the iPhone's design afterwards. Their bluetooth headphones are pretty much a carbon copy of the AirPods although I'm sure they had bluetooth headphones before too. I commend their attempts at making a foldable phone now as they're clearly willing to take risks but it's a crap implementation. It's clunky as it is, software is poorly designed for it and it's too fragile. If the technology gets refined to something that Apple considers worth their time, Apple will likely come out with some foldable or expandable phone and everyone will go "ahhhh, this is how it should have been" and they'll have software solutions to go with it and within a phone generation, Samsung and Google will have copied it.
Samsung are great with evolutionary products such as bigger screens (stuff Apple looks to have copied in return) but they're not great with *revolutionary* products. That's fine though as they produce all kinds of great products on their own and contribute massively to technological progress in their own way. Apple's special sauce is spotting some ground breaking technology and being able to not only realise how it could change things but also how to make it work in such a way that it's comfortable for people to actually use. It's something I hope they never lose from their ethos.