Hi,
You don't need those specs to do development, we have not yet updated our website with the specs, I'll see if we can make that happen sooner rather than later.
However, I would suggest purchasing one of our low-end devices in addition to the TV as the TV does not support SDTV mode, so you won't be able to test your channel in that mode, which is a requirement if you want to publish your channel on anything other than the RokuTV, Roku3 and StreamingStickUSB.
- Joel