Let the hive mind of Engadget get that for you.
"For a long time I have been searching for a portable device where I can store all of my CDs in MP3 format and stream the songs wirelessly to my HiFi system. The portable device must I've tried FM transmitters, they all suck. I don't want a docking station. Any help? Thanks!" have a display so that I easily can scroll through the playlists (I don't want to use a TV or monitor). I suppose that there must also be a second device that is connected to the HiFi system that would receive the wireless streams from the portable device.
We have no idea where innovation will arise from. Some of the most interesting innovations in any given industry arise when technology from another industry crosses over. I think you are quite bold to suggest that this 3M's product is a waste of money. 3M after all invented duct tape, and then, when some desperate person wrapped his genital-wart-covered penis with that duct tape, 3M noticed there were positive results and they developed a glue-based treatment for HPV know by the brand name of Aldara. So, will all due respect to you poopie-pants pessimism, I'll give 3M the benefit of the doubt.