Our world is constantly evolving, with technological advancements oscillating between the incremental and the game-changing. This 45th contemporary contemplation of emerging technologies and gadgets explores new realms of technological progression and efficiency.

Thoughtfully developing on previous discussions, let's delve deeper into wearable devices, zero-trust security models, and quantum computing, paying close attention to their implications for efficiency optimization.

Wearable technology is no longer a future concept; it is seamlessly integrated into our present lives. Fitness trackers, like the Fitbit Luxe, not only monitor heart rate but also track our stress levels, offering actionable insights on improving health and productivity. Genetic testing company 23andMe's latest venture, as reported recently, seeks to combine its genetic know-how with Fitbit-style wearables to steer users towards healthier lifestyles based on their unique genetic predispositions, heralding a new age of ultra-personalized healthcare.

Stone coated metal roofing, a technology breakthrough untouched upon in previous discussions, showcases incredible durability and energy efficiency. Decra Roofing, a pioneer in stone-coated steel roofing, ensures consistent home temperature and helps save significantly on energy costs, proving that tech innovations can come in various, unexpected forms.

Another critical emerging tech trend involves zero-trust security models. This method, a departure from traditional security models, operates on the premise of "never trust, always verify." Google's BeyondCorp Enterprise embodies this approach, providing secure access regardless of the user's location or device. Incorporating zero-trust models can substantially decrease the likelihood of cyber threats, keeping technological infrastructures efficient and secure.

Also, we need to look at quantum computing, a new titan on the technology horizon. Quantum computers such as IBM Quantum Eagle promises unprecedented computational power due to qubits, and far more superior to classical bits. Quantum computing could revolutionize multiple sectors, from cryptography to complex problem-solving, by achieving in seconds what might take traditional computers years.

Lastly, hover over to the advancements in transportation with gadgets like eVTOLs (Electric Vertical Take-off and Landing), which are intended for urban mobility. Companies like Volocoptor and Lilium are in a race to create the “Uber” of the sky. These aircraft promise emission-free, efficient travel, slashing commute times in densely populated urban areas.

These are just a fraction of the emerging technological advancements shaping our world today. Wearable devices enhance personal productivity; stone-coated metal roofing optimizes resources; zero-trust security models provide robust, efficient security; quantum computing promises breakthroughs in complex computations, and eVTOLs sketch an image of efficient urban mobility.

Certainly, as we continue to integrate these advancements into our lives at work, home, and on the go, they will significantly impact personal and collective efficiency, provide better security, bolster productivity, and ignite opportunities previously thought to be unattainable. Take note, for it's these innovative tech trends and gadgets poised to shape not just the immediate future but generations to come.