If you have no Mac specific requirements, like Virtualization, dual boot, multi user accounts, drag and drop style file copying, access to external USB drives using file structure and read/write access, floating scalable multi windowed multitasking etc, then your needs could easily be met with a 9.7" iPad Pro.
I have a Mac desktop station for movie transfers, editing, scanning pictures and videos, media server and centralized backups but for daily routine tasks such as mail, web access, You Tube, Skype / Face Time, MS Office document handling, magazine reading and even playing games, my 9.7" iPad Pro is light, fast cost effective and the battery lasts the whole day. I also have the Apple Pencil to annotate documents and take hand written notes and draw sketches.
In your case, it looks like you may be happy with an iPad.