I don't remember anyone ever saying disc brakes were pointless, or suspension for that matter.
errrr, pretty much everyone did, when did you start mtbing? When I started disk brakes were soemthign DH'ers used, and even then they were only on the expensive bikes, middle of the range meant magura HS11 or HS33, 905 of bikes had v's and MBR slagged off bikes with disks as being too expensive or the spec was too comprimised compared to the same price point bikes with v's. You were looking at £1000+ before they were even an option.
Edit: and whilst upy downy seatpost probably wont make it down to £99 halfords specials like disk brakes have, I still reckon they'll be OE on most bikes aimed at 'all mountain' riders 9christ i hate the marketing spanner who thinks these niches up) within the next 5 years.
Ditto suspension, it was still posisble to buy a mid range bike with rigid forks and mags still liked them for their extra controll and low weight.