Dream CordKiller box? Here is what I'm doing and what I'm looking forward to.
Currently I have a Google Compute Engine Instance, With a Plex server, a 1000mbps connection, and a web interface to download content from various sources. That box is accessible from my phone and allows me to get 1GiB movies, documentary and whole seasons of shows playing in under 3 minutes.
Its working great, but it was a bit of a pain to set up, even for a veteran Linux user. It takes about ~15 a month to run that 24/7, but with a cron job to shut down the box when I'm not using it, it should run under $4 a month. It is also space limited, only 50gb of hard drive space, which runs for $2 a month, that's cheaper than Google drive, but more expensive than Google Cloud storage.
It could also be more integrated, currently I manually go to the Outh2 API playground to start my server, the Google cloud console to check on my expenses, an SSH app to configure my box, SSH to shut it down, X2GO to visually configure it, myPlex to see the videos, a separate site to access my "content service" server on my box. It could be one app.
Given that my 5mbps Up connection can handle 2mbps upstreams, My dream box would have the following:
bluetooth (for speakers)
Plex, with Plex remote
Fanless ( Absolutely Silent )
4K-support (Intel HD 4000 can handle it, check AMD)
Screencasting (Flash content, Twitter, gifs... etc)
SSH (hackability and backup config)
No bright blue LED of death
Micro USB charging port (A la Chromebook 11)
Small (Max 6" x 3" x 7# ) Like a Madcatz M.O.J.O.
Run ArchLinux or Debian, (Android doesn't support half the list).
Android app or Mobile Website for Easy configuration of passwords and feeds, with bandwidth statistics, Recommended RSS feeds.
Chromecast HDMI input and switching from the app
This can be pulled off at ~$300. Wishful thinking?