Its ALWAYS video, youtube, facebook, a website with a video, always a video clip which kills it for me.
Since the MSI laptop is mentioned, I really liked the look of the MSI laptops the super raid and cool boost looked interesting. Without wanting to pee on your parade, I'm talking about my specific need for Ultra performance not just high performance.
I ruled out MSI machines after visiting Scan's showroom (they are only up the road from me in Bolton), for some ungodly reason they use mid-upper-range processors like the 4710mq, 4820hq etc, never any high end CPU's not even 4980s which is where Alienware stop, no sign of 4940mx or anything. They also choose to use the 3gb version fo the nVidia gtx 970m gpu instead of the 6gb gtx 970m, which is an odd choice.
The only reason I can see for this, is they are built to a price. Hardcore users don't care about the price, they value time, least I value time. For 90% of the population they are overkill and be absolutely great.
Its not an often occurrence, I'd say once every 20-25 renders I've had this. Normally the beasts are perfectly happy munching away at the workload while you carry on working on screen 2, just every now and then a buggy program has a bad hook or a memory leak and pop.
When you consider these kind of machines take what could be 18-20 hours of locked/frozen 100% transcoding/rendering and turn it into 2-4 hours of 80% resource usage, you can see the value.