LostAlone :
4500$ for an SLI laptop? The mechanical keyboard and the access to component is great, however, all this doesn't worth 4500$.
Discrete GPU is the way to go for laptop with thunderbolt.
This gets so boring to reply to....
Some of us WORK ON THE ROAD, and can ONLY HAVE A LAPTOP.
There, see now? Its not possible to carry extra screen, GPU, or whatever YOU think a traveling user should have.
There isn't just this laptop, desktops and nothing else in between you braying jackass.
The point that everyone here is making is that this thing is so expensive and so ungainly and aimed seemingly at no-one. You can get a fine gaming laptop for $1500 that is more than adequate for playing in your hotel room. You can buy a Surface Pro or equivalent and have a machine that'll run almost every indie game going.
Just because you can't carry a screen around doesn't mean that this is your only option. If you want power you can get it cheaper. If you want something mobile you can get it cheaper. If you want something mobile and something else powerful you can get both of those and treat yourself to ice cream too without spending this budget.
I travel for work a lot but I bought a second hand Surface Pro 2 and play Isaac and FTL and Spelunky. It turns out that I really don't need POWER to twiddle away an hour or so in the hotel room.
Man, I don't want to get in a war with you but comparing games that cross between pacman and mario bro's don't even compare to cutting edge like Witcher3, Fallout 4, GTAV, Rise of Tomb Raider, Doom(2016), Metro Redux's, Crysis3, Assassin Creed IV-V and many other games these things will rock @ 60fps 1080p. A used surface-pro2 ain't gonna come close. Are they over priced? H*ll yes. Will a $1500 laptop/tablet even tap 60/1080p at max DX11/12 setttings? H*ll no. Heck, even if you go full on w/ a new pro3 fully loaded you're 2/3 of the way in and outside of a better screen(I admit MSI blew it not giving either 2k/144hz or 4k/60hz) its still won't match all the other specs and benchmarks. If so, show it!
Not arguing the price but try and build a "laptop" with these specs on your own and you're still pushing $2-3000 between the 2 980's(which btw have more Vram than the desktop versions), MOBO, SSD's, DDR4 RAM. Bottom line is that these things get built because there is a market. All first time cutting edge, niche markets are expensive, maybe you don't remember when a 40" flatscreen cost over $10k even though now you can get one for less than $300 or the 128GB SSD's that cost over $500 or the DDR4 memory that 2 years ago was almost double. Point is new tech always cost ridiculous amounts and prices only drop when they reach a mass consumption level.
People need to understand that unless they can prove there's a like for like alternative that's cheaper these things will get bought and continue. From MSI, to Gigabye(Aorus), to Razor, and others the pricing schemes are similar: single 970M(1500-2500), single 980M(25-3000), dual 970M'S(2800-3200), dual 980M's(3000-4000), dual desktop 980's(4000+). BTW for those who don't know the M's(mobile) are usually equivalent to 1-2 steps back in desktop terms(i.e. a 970m is like a gtx950-960). Again, don't compare a Camry to a Viper. Both are fine, but neither is in the same class.
The best alternative thing I've seen to any of this are the new GPU docking solutions(some now with nearly 700w power) coming out which are also way overpriced but are exciting for low-cost latops with good battery life but then giving a much closer desktop experience when plugged in. Basically you can buy a 1000-1500 laptop, 500-600 docking, and then upgrade your GPU's like a desktop as desired.