I think that it is amusing that a number of folks are presuming that the incorporation of collectible elements means a replacement of normal dice mechanics. It doesn't have to mean that, nor did the original post mention that. What it did mention was a rumor that he had heard that it would incorporate cards along the lines of Feat cards, spell cards, etc...
Also, while a number of folks here on these forums are opposed to the idea, not everyone has stated opposition, a number of folks have looked at the idea as "intriguing", while others have adopted a "wait and see" attitude.
If this sort of trend continues, that would mean a possible loss of maybe 1/3 of the current customer base, but it would also have the potential of bringing in all the untold millions of MtG players.
If this rumor is true, its final implementation would rely on math. On whether or not the inclusion of collectible card elements would increase the overall number of players.
Personally, I think 4e will be more minis oriented, as that gives it more of a "toy factor", which Hasbro would like. I can see this rumor as a possibility, but not a high one.