DESIGN INTELLIGENCEJuly 23, 2026·Mary · DEPIX Design Intelligence

The Smartwatch's Original Sin Was Deciding It Was a Computer

The smartwatch has a design problem it has never quite admitted: for most of its life it has been a computer wearing a watch costume. Apple set the template a decade ago with a rectangular screen — in effect a tiny phone strapped to the wrist — and the logic was sound. A rectangle shows more text, holds more buttons, wastes fewer pixels. It also made the Apple Watch instantly recognisable among a sea of round rivals and, despite everything, the best-selling watch on earth. But it never stopped looking like a gadget. You wear it; you don't quite treasure it.

The 2026 counter-movement is quietly making the opposite decision, and the Xiaomi Watch S5 is a clean example of it. Instead of a screen you strap on, it is built to be a watch that happens to be smart. It has a round dial and a fully functional, knurled stainless-steel rotating crown that actually turns to scroll — mechanical feedback, not decoration. Its 46mm stainless-steel case feels solid without being heavy, and its watch faces openly quote classic mechanical watches, Roman numerals and moon-phase complications and all. Crucially, it runs up to about three weeks on a charge from its 1.48-inch AMOLED and large battery — because a watch is a thing you wear and forget, not a thing you dock every night. Smart is the adjective. Watch is the noun.

Here is why this is a concept-phase story and not a spec-sheet one. The single most visible difference between these two philosophies — round versus rectangular — is not a styling choice made at the end. It is the direct, unavoidable consequence of one identity decision made at the very beginning: is this object fundamentally a screen, or a watch? Choose "screen" and the rectangle is correct, because a rectangular display genuinely shows more usable text and fewer chopped margins. Choose "watch" and the circle becomes non-negotiable, because a round face is what reads as a watch and carries a century of analog design language — which is exactly why Samsung, Fossil, Garmin and the rest went round to separate themselves from Apple.

That one decision then cascades into everything downstream. It sets the crown — a real one you turn, or a flat side button. It sets the bezel and the case material. It sets the battery target, because a watch-first product cannot ask to be charged nightly and so must chase multi-week endurance from the first architecture sketch. It even constrains what the software may do, since a round display forces designers to accept the "chopped text and frustrating margins" that a rectangle avoids. You cannot bolt any of this on later; by the time a team is choosing watch faces, the shape has already decided the product.

The tell is behavioural, and it is the part every designer should sit with. People treat a gadget and a watch completely differently. A gadget is a device you charge, upgrade and eventually put in a drawer; a watch is an object you wear to a wedding, keep for years, maybe hand down. The round-versus-square debate has run for a decade without a "winner" precisely because it was never really about geometry. It was about which of those two relationships you were designing for — and that is a question of identity, not pixels. It is telling that even Apple is now reportedly exploring a round watch: a hint that the "screen" framing, for all its success, left something on the table that the "watch" framing keeps.

None of this makes Apple wrong. The rectangular Apple Watch is a masterclass in ruthlessly optimising for a clearly-chosen identity — a wrist computer — and it dominates because that choice was made early and honoured completely. The mistake is never picking the wrong answer; it is treating the shape as a late aesthetic tweak rather than the first and most binding decision on the board. The Xiaomi Watch S5 is interesting not because round beats square, but because it is honest about what it wants to be from the first line, and lets that single conviction pull the crown, the case, the battery and the face into agreement. Decide what the object is before you decide what it does — and the wrist will tell you whether you got it right, because a gadget comes off, and a watch stays on.

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