AvFan, the term would be 'consultant'. just add it to the list:
Financial Consultant
401K Consultant
Insurance Consultant
Travel Consultant
Network Consultant
PC Consultant
"Home Theater" Consultant
Medical Consultant
Wardrobe Consultant
Home decorator Consultant
Tax Consultant
Makeup Consultant
Web Site Consultant
Etc Consultant (ops), etc, etc .....

A little perspective…..
In a short time we went from 2 channel stereo with vinyl, open real tape, good FM, mono TV and Dolby surround movies.....

...To fully automated home entertainment or some form of..... including:
5.1/7.1 surround, cable/satellite, Subwoofers, Tivo, slim box ,PPV, CD, DVD, HD-DVD, HD TV, TV shows for purchase-DVD, programmable remotes, non-brick-in-mortar companies, i-pod, Playstation, XBOX 360, WII, Plasma, LCD, Laptop PC, projector & screens, mp3's, DLP, in-wall speakers......
Now .... connect it all together .... push ‘play’ ….. its easy. if you have a magic wand.

We made this change in 20-25 years. The majority in the last 10 years. Throw in the fact that companies care more for the bottom line than consumer bliss ….

…..confusion abound.