Like seeing the FX-6100 to $145; I would not have any aversion in using it on a new build, as long as two things: Firstly the price for 970 mobo needs to see some price movement, and secondly I need to be (more) assured that those AM3+ socket mobo will provide a clean socket compatibility with Piledriver. There's nothing wrong with going with that setup when you can get those 2 parts for say just over $200. While knowing in a year you've the upgrade to an (hopefully) enhanced chip for still a decent price.
When you factor in a quality Z68 (that insures worthy of an I-B upgrade) and comparable Intel CPU the price on those two today is minimum $75 more. While I'm sure even if Piledriver is exceptionally better or even to say even almost par with similar I-B's (may be stretch). Intel won't attempt to be competitive with their prices, meaning an I-B upgrade could be cost at least another $40.
If this plays out as such sometime 10-14 months from now the Intel path costs something to the tune of $115 more, and you might not be nearly that far above in performance over the AMD path.
This is all speculative so don't go flaming out, but this could be a scenario of how it plays out. Buying into a platform (CPU/mobo) right now is a gamble for either path you choose. If AMD squared away the socket compatibility for sure, and got mobo’s to drop (rebates like $15-20) they could really present a value proposition all the way up to and after I-B shows. That's what AMD has normally provided, and if they know Piledriver is a sincerely advancement, those two thing could speak volumes to the dependable AMD purchasers’ without even mentioning Piledriver performance in the dialogue.