Actually, funny you mention this. I was asked to do magic the other day, on a bus, on the way back from camp. Cards were in the luggage - didn't have a thing on me. I mentioned it in passing, and my friend, who had asked to see the magic, replied, "Well I guess it tests how much magic you can actually do - test your improvisation."
It was interesting, then, to hear from the horse's mouth.
Don't get me wrong, I love card magic, I perform primary with cards, and I did a great routine with cards the day before which got great reactions. But if I can magically read minds, divine cards, predict the future, etc., why do I need cards anyway? If you have these abilities, why can't you apply it to something without your cards?
Well, I can, why not? I ended up performing a number of suggestion/prediction routines that work entirely with minds. I mean, in a performance situation, cards can be passed off as something useful to simply focus on for the sake of the effect. But really, there's so much more you can do.
The point is that the impromptu nature of performing magic with absolutely nothing, no props at all, and on a seemingly spontaneous whim, can only enhance your magic.
I feel it is inappropriate to refer to Tamariz, Malone, etc., in this situation - they perform great card magic yes - but how many of us have the skills of Bill Malone? Seriously, how many?
For all of us who aren't Bill Malone - this sort of impromptu magic is an excellent way to increase our diversity, our skills and range of magic, and even our perceptions as magicians.
In other words, put the cards down. You're not someone who does tricks, you're a magician. I hope.