Apple has a tendency to be among the first to drop support for older features, even if they're still widely used. This was the case when the company ditched floppy disk drives, dumped optical disk drives, and more recently the controversial decision to remove the 3.5mm jack from its latest phones.
The latest rumor suggests Apple has removed the traditional USB-A port from its new MacBook Pro lineup. The source of this intel is Japanese website Macotakara, which previously predicted Apple would drop the headphone jack from the iPhone 7.
If the rumor is correct, the new MacBook Pro lineup will no longer feature full-sized USB ports, and will exclusively feature USB Type-C and Thunderbolt 3 ports:
If the report is true, MacBook Pros will only come with USB Type-C and Thunderbolt 3 ports. As with the new MacBook, you'd presumably charge it through the USB-C port and connect peripherals via Thunderbolt 3. That would also mean you would need some kind of USB 3.0 adapter, since the majority of storage and other peripherals still use the traditional standard. For the MacBook, Apple sells a $79 USB-C dock that gives you USB 3.0, USB-C for power and an HDMI connection.
Personally, I think this is just one more reason to avoid Apple's expensive laptops.