Interesting discussion - I'm a bit late getting involved, but I haven't been on the forum much for a while.
Just to throw a few of my views in there:
Vinyl is to my mind, still the best DJ medium - for turntablist skills and energy that just can't be replicated by CD or digital. You may be able to recreate the sounds and effects, but nothing is as awesome as watching a skilled DJ juggling beats on a couple of Technics.
That said, that style of mixing is pretty much irrelevant in Psy & Especially Goa Trance as smooth blends are preferable to chopping up tracks, due to the nature of the music.
So - that leaves CDs and digital. I mix at home with CDs, because that's what my music collection consists of. I never embraced downloading, so digital mixing isn't an option for me.
For the gigging DJ, I can see the sense (and convenience)in digital mixing, but as a punter there's no denying that having that screen up is a bit off putting, (to me anyway.)
This brings me to the part I have a problem getting my head around - it seems to me, that the only people who are actually bothered about what media the "DJ" is using are other DJs or producers, mainly those who are against long-time developed skills being made redundant by technology. I honestly don't think 95% of the dancefloor care at all.
Now, I know pretty much nothing about digital or laptop mixing, but there seems a large spectrum of how involved an artist gets with playing their set. Take Tristan for example - last time I saw him, he used his headphones maybe twice in the whole set and most of the time was dancing and waving his arms in the air - I'm not knocking him for that - he's very entertaining and the crowd love him, but I'm guessing he can't be far off pressing play on a pre-arranged set. Does that matter, if the dancefloor is rocking? I don't know tbh...
On the other hand (not Psytrance obviously) take the likes of Richie Hawtin or Chris Liebing - pushing the boundaries of what digital kit can do & blurring the lines between DJ & producer - BUT can you appreciate all their fancy kit and effects on the dance floor? No. Their sets are no better to my ears than when they played vinyl - so perhaps the method of delivery isn't that important after-all...
So there you have my 2ps worth. Turned into a bit of a ramble, but I'm struggling to get my head round the whole deal. On the one hand, I love quality sets delivered with talent on turntables & CDJs and would be saddened to see that side of the performance disappear, but I also see how having the beat-matching process taken away frees you up to do more creative things (whether people are aware of what you are up to or not,) or dance and gesticulate to the crowd. My stance is softening on this as time goes by and I'm starting to think that if the partygoers are having a great night, the DJ is being paid by them to entertain, not give a lesson in the fine arts of their craft...