I beleive the first generation units of both will require disks in cassettes, like the original CDs did. One format will win out over the other, likely in pretty short order. Either that, or a third machine will come along that plays both (think SACD and DVD-A).
Until it all shakes out, my current DVD player, DVHS, etc will be working just fine.
Until it all shakes out, my current DVD player, DVHS, etc will be working just fine.