I'm sure they will push those same changes to the PW1 (and Touch) the same way they pushes most of the PW1 changes to the Touch -- as soon as they write the update. The PW1 and PW2 are not the same device, even though they share a logo. The hardware is completely different, so it's not just a matter of agreeing to sign the update for the PW1 as well.
Amazon is not conspiring to sell more upgrades from PW1-->PW2, they
don't make money off selling the hardware. (it's not just a matter of they don't want to -- they don't, period.)