Based on my wants/needs the only redeeming value is the ability to stream to Roku (and future streamers?). On the other side, I currently have four tuners (2 networked HDHomeRuns) and a Windows 7 PC running WMC at zero per month for a total investment of $410. No, I couldn't live without series scheduling, guide, etc so is it $5 a month for one device or $20 if I purchase four?
Cost wise it would be $600 (Simple.TVs), $90 for Roku (wired version) plus the monthly subscription. With my current setup I can view TV on any Windows PC (live or recordings)/Mac (live)/laptop/etc. I see it's using MP4 which makes me wonder about the quality of its image... quite a few unknowns I look forward to seeing answered. If they retain the native image quality, support enough clients and integrate multiple units management and interface transparently I'll take a closer look.