If you don't want a crippled DRM stick? Then accept you are gonna need an HTPC. You can get one of the Chinese ARM boxes but I find they are rather limited on the amount of software you can run on 'em, a better choice IMHO would be to get one of the AMD Socket AM1 chips which is what I've been using at the shop. Crazy low power (average around 8w-12w according to kill-a-watt), GPU powerful enough to do 1080P with no sweat or lagging, and if you don't want to spend $$$ on an OS you can slap on OpenELEC and have a 10 foot UI OOTB.
With something a little more powerful, you could also throw a Plex server on there and stream your own library to a Chromecast while on the road. My home media server runs on a headless A4-3300. One TV is driven by an nVidia ION nettop and another is driven by a Raspberry Pi; both run OpenELEC. The combined setup might use a little more power, but it's definitely more flexible. The server, for instance, uses Greyhole to manage storage across multiple disks with varying levels of redundancy (more for documents and photos, less for movies and TV shows).
Even though your monitor's equipped to handle HDCP-crippled content, your Linux box works just fine with it. Likewise, there are non-DRM content options (including serving up your own media) for gadgets like the Chromecast and Fire Stick.