My feeling is we'll know if MS is serious about this generation or not at E3. If MS fails to introduce a new hardware design at E3, then that will be the signal they have given up this generation.
They only way they are ever going to get rid of the RRoD baggage is to introduce a new design. There are people who associate the current box with RRoD, even if the internals are changed. In addition, the current model is starting to look clunky and dated. They really need a smaller, quieter, sleeker model desperately.
If they don't introduce a new model, then they are content to be this generation's Gamecube. Which isn't necessarily a horrible thing. But they will need to learn from their mistakes if/when they come out with a third generation console.