Fortunately that use case is quite well covered by alternative solutions, like Roku, Chromecast, Fire, or a homebrew HTPC running something like Kodi or Plex. The Raspberry Pi is a popular host device for that.
"DRM related content such ad HBO Go, Netflix, etc." None of those will be supported on a device for as long as they will be supported on a PC. Not that I'm a PC fan, but the general purpose operating system idea really shines here.
I disagree. Only a homebrew HTPC is at risk of losing those things. Any of the commercial streaming boxes/sticks from a reasonably reputable company should have support for DRM-protected content for the indefinite future. After several years a specific version of the hardware may stop receiving updates, but that's not a big deal when the original device cost $35 (assuming that you can pick up a similarly-priced replacement in the future).