"But it's unclear why Pine Trail is two words and Pineview is only one word"

I think they name them after rivers in northern California.

If the GPU is still not up to providing HD resolution video playback then I'm not interested.

This sounds like a way to kill the AMD ion in its cradle. Or at least force ion purchasers into buying an redundant intel gpu with every system.

I think they are named after rivers but not just in Northern California. The Nehalem, for example, is in Oregon.

http://en.wikipedia.org/wiki/Nehalem_River