There are numerous changes from the 2015 G, but the most notable is the display. The G4 and G4 Plus have a 1080p 5.5-inch panel, which is a bump from the last phone's 720p 5-inch offering. The additional pixels are welcome, but the new screen makes the duo larger phones overall when compared to their predecessor. If you consider that the first Moto G (launched just two and a half years ago) had a 4.5-inch display, that's a significant increase in size for someone who's skipped a generation or two.
Powering that display is a Snapdragon 617 octa-core processor paired with 2GB or 3GB of RAM depending on how much storage you opt for. Battery life will hopefully see an improvement too: the Moto G4 and G4 Plus have a bigger 3,000mAh battery and "TurboPower" functionality for fast charging.
While the G4 and G4 Plus share the same basic spec, where they differ is in the details. The Plus has a fingerprint sensor and a 16-megapixel rear camera with an f/2.0 aperture, "big pixels" and laser and phase detection autofocus. The regular G has a 13-megapixel sensor (likely the same as in the current G), and no biometric magic. Both have a 5-megapixel front-facing camera and will be customizable with the company's Moto Maker service.
We don't have full details on the Moto G4 Play, but it's definitely going to be the cheapest of the three. It's got a 5-inch 720p display, a Snapdragon 410 processor and a 2,800mAh battery.
The vanilla Moto G4 comes with 2GB RAM and 16GB internal storage. The G4 Plus will have the same, unless you go for the model with 32GB of storage, in which case you'll get 3GB of RAM. Those opting for a G with less storage will be happy to know the microSD slot remains, and now supports cards of up to 128GB.
Both phones represent a decent upgrade over the current generation, and at not much of a premium. They're coming to the company's largest markets for the G series first, with the G4 debuting today in Brazil and the G4 Plus in India. After that, they'll arrive across Europe in June, and the US in "mid-summer." Astrologically that would mean June too, but at the very least we can say they'll be with us before the end of July.
We're still waiting on US pricing, but the UK versions will start at £169 for the regular and £199 for the Plus. There's not much value in translating those prices into dollars -- especially considering the pound has weakened significantly over the past year -- but what we can do is point to the original starting point for the current Moto G: the 8GB model started at £159 in the UK, and $179 in the US. Given the currency fluctuation, we could see a $179 entry point in the US based on the new £169 pricing, or perhaps it'll increase by $10 or $20.