It's enough even if you enabled a HDMI PC monitor habt-
The USB host can connect a USB hub and then connect mouse keyboard hard drives USB flash drives.
Power comes from either the 5V power supply with ideally 2A or mobile from the Power Bank even better.
Thanks to Flash and other codecs can play almost anything.
Why spend hundreds of euros when it all together with complete connectivity can connect even more, and even as a bonus one needs no special Chromecast streams its smartphone Inhalz simply on the TV screen.
Convenient to show videos or photos but also APPS can show so many people.
My conclusion could not be better!