Looks like a fancier version of their previous SimpleTv 2 dvr from a few years ago that bombed so badly. 2 tuners, 250GB storage, and $35 a year dvr/guide data fee. IMO, price point should be about $149, but they'll probably want at least $199.
The common term for that is "Network Attached Storage" or NAS. NASes aren't cheap but they consume a lot less power than running a conventional computer. With quite a few of the better routers, you can create a NAS by plugging in a USB hard drive.
I don't understand how any modern device can reasonably omit Roku compatibility; maybe the winds have shifted.
Catching up with Silicon Dust, makers of the HDHomeRun
"Meanwhile, a native Roku app seems out of the question, because the platform doesn’t support MPEG-2 or certain audio-decode formats that HDHomeRun uses. (Other networked tuners, such as the Tablo DVR, deliver video to Roku players with HTTP Live Streaming, which results in long loading times for live channels.)
“Multiple times, they’ve said to us, ‘we’re never going to do this, stop asking,’” says Edwin Kim, SiliconDust’s vice president of products."
I love my HD Homerun devices, but I hate the fact that that SiliconDust won’t develop a grid guide. I do not like their guide interface and I won’t be subscribing to their DVR service until they provide something more user friendly. Most cord-cutter friendly companies have learned from customer feedback that grid guides are still the most efficient method to display guide data.