Just some useless thoughts here but...
I will be completely dumbfounded if in fact the Attain is released at the same time or especially if before the Thrill.
I mean, as said before, the Thrill has been announced and was supposed to have been released by now...while nobody really has any concrete evidence the Attain is coming this month. (OK, so we have the Samsung CEO or whomever that was quoted as saying August but nothing more). Why they would suddenly sneak in this 'World Beater' phone before the Thrill makes no sense to me. If I was LG, I'd be wanting the Thrill out NOW to get a jump on the SG2.
Maybe it isn't LG's fault at all...I have read that the Thrill delay could be due to ATT saying they would have Android 2.3 on all devices in 2011...so they may be upgrading it from 2.2 before release.
People that want a 3D phone will get the 3D phone. I don't think Attain will affect that phone TOO much. It kind of has its own niche.
I thought the Thrill would have its own "niche" market as well...until I found out it was being introduced at a $99 dollar price point. Sure, it has 3D but it is not like you have to use it all the time. Its just a neat bonus, and with that phone having high end hardware and getting great reviews it has suddenly put itself right next to the Attain on my "want" list. I can afford a $200 dollar phone, but I'm not a heavy user, and also if I can have nearly the same performance for half the price plus 3D....it sounds very tempting.
That said...I think I'd still rather have the Attain; 1) If it comes out remotely soon and 2)if I can get my hands on one through Amazon, Walmart, Target (and keep my same talk plan) for $150 or less it will be my choice. If its is $200 or more..I'm not sure what I'll do.