No sorry maybe you misunderstand, When they say it can support 24Mbps only the 3.0 devices with HS can between eachother
They do this by establishing the 802.11 between themselves. The 802 radio is built in to the bluetooth device.
What this means is you need both devices to be 3.0+HS to get those speeds and to use thier built in 802.11
4.0 has been developed and should be on new phones and tv's soon, but so far the only benefit I see is a lower power consumption.
personally i think bluetooths on its way out :P put it all through the router, if your sending stuff to a smart phone there are apps that can turn your phone into a server over the router fairly handy.