Bluetooth has distance limitations on each individual device that may want to be controlled so a remote manufacture will probably use the RF extender/base as a repeater to the Bluetooth device(s) like Logitech has done for it's remotes to control the PS3. It's a better solution so they don't have to support questions like "What type of XYZ do you have and what's the model number. Oh, that only has a 30cm range where the model up has a 30 meter range." RF however is more known (still not guaranteed) but can be built device independent.
I also like the Harmony because of the Z-wave wireless they use. Each Z-wave device must be able to be a repeater. This is a requirement of the Z-wave protocol and creates an environment that can extend and self heal if a device goes off line. It's pretty elegant when you consider a light switch can become a wireless repeater for your audio equipment control.
What I'm trying to say is don't wait. Enjoy now if you can.
HG Cherry M60's,VP150,Qs8's,EP350