You can be sure that there are plans to do such upgrades in the future… just not publicly announced plans... probably because they want to conceal the fact that the R22 is essentially the hardware equivalent of the HR21, but they want to have a lease price of $100 for one and $200 for the other, even though they are both the same thing.
Well, the R22 invites hackers to convert it into a HR21, doesn't it?
The first main purpose of this DVR is to obsolete the R15 ASAP. That would bring all of the DVRs under D*'s direct control.
I think another long-term goal of the box is to allow D* to stop sending MPEG2 SD locals. They'll use this box, which will receive MPEG4 HD locals and output them as SD. This box can also receive MPEG4 SD locals, but why would D* send those if they're already sending MPEG4 HD locals? This transition will eventually free up quite a bit of bandwidth. But they are in no rush.
The first channels to go would be the 72.5 locals. It's a pain (and not as profitable) to install TWO dishes at these sites. Though when I started a thread on this topic two months ago, no one could agree on what the plans were or if there were any plans.