It does what it says on the tin
I attended the Monte Carlo Bluetooth Congresses back in 2001. Two things stuck in my mind: 1) that Microsoft was only paying lip-service to adoption despite being a member of the SIG and 2) that the Wi-Fi brigade had misunderstood the concept and saw it as a competitor rather than a complementary technology.
It's a shame it's perceived as unsuccessful. It's a phenomenally useful product when it works, as a short-range personal networking and cable replacement technology. I sync my Nokia and Mac address books with it; I use a wireless keyboard and mouse during presentations; my wife and I exchange photos of our kids. For the record I don't have or want a Bluetooth headset.