The details haven't been published yet but they will have to do a Technology Guarantee to support hardware vendors in the "Back to School" surge. The dates are supposed to be July 1 - January 1. If you don't actually need a machine between then and now, it's probably worth waiting.
One advantage of getting the license with the machine is that some vendors (i.e. Dell) won't support anything but what is delivered with the machine. If you get a license voucher with your machine, they are obligated to support it if/when you upgrade. They will still support the hardware but it's just another hassle to be avoided.