I think computers and laptops like Google Chromebooks, and some Android PCs which are mostly used for web browsing don't need video ports like HDMI or VGA because most people who use Chromebooks and similar computers would mainly use the monitor which is built-into the PC.
There is also Google Chromecast, Apple TV, and wireless video which let users easily display a computer's desktop and programs like web browser to a TV or monitor which has Chromecast, Apple TV, and wireless video.
I think in the future most Chromebooks, Android PC, and other computers will come with USB-C which let you hook up a monitor with a USB-C cable like how the new Apple Macbook Pro 2017 just have USB-C ports, and you need to use a USB-C monitor to hook up an external monitor, or use a USB-C to HDMI adapter to hook up a HDMI monitor.
There is also Google Chromecast, Apple TV, and wireless video which let users easily display a computer's desktop and programs like web browser to a TV or monitor which has Chromecast, Apple TV, and wireless video.
I think in the future most Chromebooks, Android PC, and other computers will come with USB-C which let you hook up a monitor with a USB-C cable like how the new Apple Macbook Pro 2017 just have USB-C ports, and you need to use a USB-C monitor to hook up an external monitor, or use a USB-C to HDMI adapter to hook up a HDMI monitor.