Nice stuff, but personally if i had the money i'd rather make a desktop that's easy to carry around (to LANs of course). Laptops are too much fixed component-wise.
I find DTR's useful in the lower end market segment for people who want limited mobility or don't have the space or will to have a full sized desktop machine. My ultimate laptop would be thin and have 10+ hours of battery life.
Dell cannot incorporate AlienWare too much because they use AMD. Dell themselves are Intel-only and get massive rebates from Intel, as such they don't want to risk these lucrative deals. Intel is known for using such monopolist tactics and exclusive agreements.
What this means for competing Dell and AlienWare lines, i have no idea.