I have to slightly disagree on this.
The 12" MacBook was one of the coolest concepts Apple has ever released. And one of the best looking laptops ever, IMO.
But it was relatively useless as a working computer. The CPU - even as underpowered as it was - still throttled wildly whenever you tried anything slightly taxing.
I got one as my work machine, and although it was always the best looking machine, it was slightly useless.
That said, with a new, less power hungry Apple Silicone chip, be it a variant of an A chip or an M chip, could be Apple's most awesome laptop, ever. Just make it with aluminium, preferably with the tapered design, and not plastic like the iBooks and MacBooks of old.