That's not really true though it is? Look past the impressive engineering and Apple made an iPhone that turns into a bigger iPhone. That's it. It doesn't do anything new.
Samsung make a phone that turns into an actual tablet. That becomes a retro gaming dream at 4:3. That becomes a PC when plugged into a display.
When I'm spending upwards of £1500 on a phone utility > aesthetics. It either does everything or it's not worth it.
Whilst I don't doubt for one second it won't sell milliins of units the Duo is outmatched by an iPhone 17 and an iPad Mini which is about 75% of the asking price if you buy new.