I just keep going back to a video of, Optimus 2X, I think, vs. the IPhone and crushing it in browsing speeds. It's one of my big complaints. LTE may make it less of an issue, but anyone seeing how much faster dual cores browse is going to see a benefit. Now maybe it's not as big of an issue with new processors like the TBolt, but vs. the IP4 it was significant difference.
And it's a year away? So what, if you're buying a phone now you're locked in for 20 months and that seems a pretty long time to go without the benefit, especially since dual core options are already on the market.
A lot of apps are pretty simple, so I'm not sure how big of an impact dual core will really have on existing apps, anyway. But those 3 points I highlighted are pretty big selling points, I think. The average buyer may be ignorant of those differences, but I wouldn't say they wouldn't value it if they knew.