Apple has a packed lineup of 15+ new products launching this fall , including the Apple Watch Ultra 4—here are four rumored new features. #1: Major upgrades to sensors Last summer, Digitimes reported based on supply chain sources that this year’s Apple Watch Ultra 4 is expected to double the number of sensor components. More recently, the outlet said Ultra 4 will bring “a significant upgrade to sensing functions.” Digitimes says the new sensors will allow Apple to minimize its dependence on algorithmic data interpretation, which could lead to not only better health data, but also improved performance and battery life. Apple has long been working on adding blood sugar monitoring to Apple Watch, but despite some encouraging recent trends , that feature isn’t currently expected for this year.…