They're not being forgot and never will be, because as you said, they have withstood the test of time. However pushed aside they may be in this "street magic time", "Street magic" will not withstand the test of time and will die out, in a year, in 2, or in 20, it will die out and people will be once again focusing stage and parlour magic, and will be coming back to Cups and balls, coins, and still cards for close up.
And the thing is, the magicians who believe that street magic is taking over stage magic and that audiences preferr cards is completely wrong. Audiences enjoy both, and enjoy them both equally. With street magic (which I believe is the "hip" word to call close-up magic) the audience is unprepared for what is about to happen to them, and connect you to everything they've seen on TV and thought was fake. And with stage magic, they come to see you and are in a relaxed and prepared state of mind. Ready to be amazed by the first effect you perform. And are generally a "good" audience. I just worked a festival yesterday (just thought I should mention it was my third show

) and when I asked for a volunteer I had about 40 kids jumping up with their hands waving and begging to come up...you'd never be able to do something like that doing street magic.
So basically the point is (which I have horribly tried to explain in the above paragraph which I rewrote sevral times) audiences like both forms of magic, and because they like both, stage magic will never die out. Audiences also like everything in both catagories of stage and close-up and will not care what-so-ever what you perform, whether it be cups and balls, cards, coins, silks, dove acts, escape acts, ANYTHING as long as they are amazed. Cards seem to be what magicians are now wanting to utilize the most because that is what they believe the audiences like the most, but soon enough, when they get good enough to the point that they'll start doing shows professionally, they will realize that the audiences just want to be amazed, and that showing them 10 consecutive card tricks will not accomplish that. Hopefully I've made some of the members on here (although I do not know many anymore as I was gone for a while) "see the light" and realize, that you CAN do cups and balls, that you CAN do the cut and restored rope, that you CAN do a coins across routine, and still get good, even great reactions from the audience.
Best of whishes to everyone who managed to sift through that awful post of mine and make some sense of it

,
~Magically Dave