The HR21 features 100 hours of HD recording capacity, which is about double what you get with the HR20. The unit is also rack mountable, although we hope the mounts are optional. We'd rather just sit this thing under our TV where any good consumer oriented device belongs.
The flier also says the HR21 will include an "optical HDMI port," which will allow you to transmit digital signals over fiber optic cable. Oh yeah, and this will be the first DirecTV box to support 1080p output. On the downside, there's no over-the-air antenna input for anyone who can't get their local stations in HD from DirecTV.
[via Engadget and technabob]
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