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Conventional electrowetting (CEW) has enabled digital droplet control, but reliance on numerous individually addressed electrodes, complex driving circuitry, and step\u2010wise motion has limited scalability and practical deployment. Orbital electrowetting (OEW) has recently been introduced as a complementary paradigm, where asymmetric electrowetting forces and electrostatic energy gradients drive droplets into continuous, high\u2010speed motion along predefined orbital pathways using only a minimal number of electrodes and simple global excitation. In this perspective, the physical mechanisms of OEW are summarized, with emphasis on how surface wettability, electric field distribution, and orbital geometry govern droplet speed, stability, and confinement. Key challenges are identified, including the current lack of robust bidirectional and position\u2010resolved control in complex networks. Future directions and application opportunities for OEW\u2010enabled platforms are outlined, such as programmable microfluidics with low overhead wiring, defogging and self\u2010cleaning of photovoltaic modules, enhancement of condensation heat transfer, and atmospheric water harvesting when combined with passive radiative cooling surfaces. It is argued that, as these challenges are addressed, OEW will substantially expand the electrowetting toolbox for next\u2010generation droplet manipulation and water\u2010energy technologies.<\/jats:p>","DOI":"10.1002\/adma.73401","type":"journal-article","created":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T06:32:23Z","timestamp":1778826743000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Orbital Electrowetting: From Continuous Droplet Transport to Programmable Microfluidics"],"prefix":"10.1002","volume":"38","author":[{"given":"Jie","family":"Tan","sequence":"first","affiliation":[{"name":"School of Energy and Environment City University of Hong Kong  Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiayu","family":"Du","sequence":"additional","affiliation":[{"name":"School of Energy and Environment City University of Hong Kong  Hong Kong 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