We're looking at a processor upgrade for our PABX. One of the "features" is to be able to give an extension number to a cell phone (yeah I know, speed dials do the same thing) which kind of negates the need for a desk phone for some personnel but I don't think it could be of value to all. My desk phone will never go flat and on a day where there are many crisis, my "smart phone" quickly runs out of juice where the calls are frequent and/or lengthy. I don't see desk phones becoming obsolete. As for PC's I agree with the comment that some CIO's and the counterparts migh not require a PC as other technologies evolve but I don't think that is the case for other personnel in an organisation.