I'm A Banana
Potassium-Rich
"Generating a treasure hoard has never been easier! All the DM has to do is open a pack of magic item cards and draw forth the result!"
That would make me unhappy. I'd probably not be one to hand out random magic items after that, which would put a big dint in some of the fun of playing D&D
Compare:
"Generating encounters has never been easier! All the DM has to do is open a pack of Monster Cards and draw forth the result!"
"Making a character has never been easier! All the player has to do is open a pack of Character Cards and draw forth the result!"
"Selecting an adventure has never been easier! All the player has to do is open a pack of Adventure Cards and draw forth the result!"
"Fighting a battle has never been easier! All the player has to do is open a pack of Combat Cards and draw forth the result!"
The game practically plays itself! Draw a character, draw an adventure, draw a monster, draw a combat card, repeat until you are out of adventure cards!
Here's the main problem with all of those, for me: they remove my ability to select what I want for my table.
A D&D game that doesn't involve real choice between known quantities might as well be Progress Quest.
Now, I do think randomizing things is a lot of fun, and I wouldn't mind those as a supplement to the game, but if I had to spend $10 to get the mere possibility of an awesome weapon/monster/character/adventure/combat/whatever, I wouldn't be very interested. I'd just play Diablo, where at least my lack of control is accompanied by bright lights and cool sounds.
I mean, you could probably play a game of D&D entirely revolving around drawing cards from different collectible decks. I'm not sure such a game would really be much of a D&D game to me, though it might be fun in a totally different way.