perhaps, but to the least, you can expect quite a bit higher frame rates with the 3870x2 (and that includes aa performance)
Even though ati did make a few architectural mistakes (at least in my opinion, they should have had far higher shader clocks independant from the core, more rops and texture units, etc), the 3870 still is a great product, its either sold out everywhere or at least has a jacked up price (which sux for us but proves its selling fast) and they did innovate with the r600's 512bit memory interface (though they should have kept that with the 3870, its worth the extra heat from the 30m transitors). Overall, I'd say ati is finally starting to recover since they were bought out (though once again, amd should have waited until after the r600 was launched to buy it, its a lot harder to produce a high end product with the stress and confusion that comes with a merger/buyout)
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