9to5Mac reports the MFi accessory makers were given updated materials for its manufacturers. This means that accessories no longer had to include a cable with products and bring down costs as users could use the Lightning cable they got with their iPhone for charging the accessory as well. Therefore, third-party manufactures using MFi logos without official authorization from Apple will face great legal risks.
Companies are now able to include and build USB-C ports on their products which will be on Apple's certified for iOS list. If you want true fast charging on iPhone X and 8 devices, you're going to use the USB-C to Lighting cable.
As the industry slowly plods towards transitioning to USB-C - in Apple's case, at least in terms of laptops - tiny shifts like this are important as the port technology progressively becomes more popular. "Made for iPod, Made for iPhone, Made for iPad, and AirPlay logos communicate to customers that an electronic accessory has been created to connect specifically to iPod, iPhone, or iPad, and has been certified by the developer to meet Apple performance standards".
It must be noted however that even though some MFi accessories could use the USB-C port instead of Apple's Lightning connector or micro-USB, the new specs do not necessarily suggest that Apple has plans to move away from Lightning. Unlike with Lightning receptacles, Apple does not allow the port to be used for passthrough charging or sync of an iOS device. One could use a product like Apple's own Lightning to 3.5mm headphone jack adapter that it included in the box with new iPhones, and then use a male-to-male 3.5mm cable to connect to a device's 3.5mm input. The new cable would improve the user experience from an audio perspective and add more durability to the entire product.