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Re:iPhone MacBook Hybrid – Apple Patent Application (2017) by sytse on Sunday May 10, 2020 @05:30PM (#23136386)
Really cool. The iPhone replaces the touchpad since it already has a great touchscreen. The MacBook can be much more affordable because it doesn't need CPU/GPU/memory/wifi/bluetooth anymore (assuming if it uses a wired connection to communicate with the MacBook).

There is also an iPad / MacBook hybrid listed on later pages. Apple didn't go this route but the new iPad keyboard https://www.apple.com/shop/product/MXQU2LL/A/magic-keyboard-... is heavier and more complex than ever before.

Re:iPhone MacBook Hybrid – Apple Patent Application (2017) by ysleepy on Sunday May 10, 2020 @05:58PM (#23136661)
This is exactly how other companies did it.

The Razer project linda has the phone as touchpad.

https://www.razer.com/projectlinda