the 7.62x51 replaced the 30-06 with around a 250fps drop. if you love the 06 its good news but if your like me and have no use for an 06 it does seem a step backwards. Now a m14 scaled down to fit the 7.62x39(not like the mini but a true scaled down m14) then I'd get excited.
It doesn't thrill me just because it's a '06, it's simply a rifle I'd want because it exists hehehe. If I hunted with it, which I enjoy already with a super tricked out m14, I would rather hit a moose with an '06 but realize both it and the 308 will get the job done.
I also agree that a x39 , lightened but not scaled down version would be a cool thing to own as well.
Hopefully this coming year will see me starting the M14S-338 federal project and maybe a 6.8 project... But we'll see