In media interviews before the panel, the game designers spoke about the imperative they felt to get things right to design cards that felt authentic to the games and series, cards that felt meaningful to the fans, instead of just constructing them based on business goals
(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield
The Reality Chip is a unique commander available in Magic: The Gathering
Skalla is completely dead
Fusing Sagas and Creatures together, these new cards have unsurprisingly drawn a lot of attention
The holographic foil should shift cleanly