as i understand it has only been proposed and will be discussed further at the next meeting
According to the minutes it was unanimously voted on, and now appears on the Rules page of the website worded in such a way that implies it is definite.

If I was a new builder, I agree that it would make more sense to buy a 2.4GHz set than a 40MHz set because, as has been stated, its cheaper than buying most new 40MHz sets and provides you with the reliability of signal. I was also aware of the section of the rules encouraging new builders to move to 2.4GHz as and when they can but I wasn't anticipating making such a change personally for maybe a year or two. If I had ~£70 put by for robot bits I would rather spend that on getting either a Sabretooth or Scorpion than a 2.4GHz set, purely because my current radio set has never caused any problems therefore changing it wouldn't lead to improved control the same way as upgrading, say, the electronics would.