Disappearing objects

Wired phonesgarage door openers
Cordless phoneswireless car door/vehicle security transmitters
Mobile (cellular) phonesGPS units (as a separate single purpose device)
(pocket) radios [Also applies to vehicles]calculators
stereo receiverscredit cards/checks/cash {the later will soon be outlawed in any case}
tape decksclocks and watches
TVspagers
CD playerscomputers as PCs/Workstations/... {which we already can not always recognize!}
modemsFile Cabinets (JMS)
answering machinesATM machines (JMS)
cable decodersMaps (JMS)
FAX machinesThermometers (JMS)
newspapers and other periodicals (in print form)Business Cards (JMS)
film based cameras (except for pure hobbyists)Security Badges (JMS)
VCRsToll Booths (JMS)
camcorders 
Some of these devices may remain as antiques/art works/... . But as separate devices they will disappear to such an extent that a child born in just a few years, will not recognize any of these devices when they enter college - except from visits to museums or "classic" literature or history lessons.