There is no reason at all for not putting AT&T H+ into the Pre3 because it only requires one radio. So yes, the Pre3 will have H+ (I refuse to call it 4G). To interesting part comes when they release the Verizon and/or the Sprint version because in order to have LTE or WiMax you have to have a separate radio inside. I owned an Evo 4G and I really don't care for Wimax or LTE because they just aren't practical data services yet. H+ is a practical radio version because it doesn't cause extra battery drainage or anything else but it isn't what we are supposed to call 4G.
"Life is Hard... it's harder if your stupid"
- John Wayne