Flexfit applies moreso to the motherboard designer.
Remember those peg-boards kids have at a young age to learn shapes?
I.e. There are circles, squares, triangles, and weird shaped blocks that you place through little holes in a Large block/box, and only the right shaped peg/piece will fit?
Well look at it this way...Imagine that your box is so small it can only hold 1 peg at a type, and to get the peg out of the box, you have to destroy the box. Also imagine that you have 15 pegs to begin with. All the pegs will have 100% identical shape.
That's what Flexfit is. All "Flexfit" gpus are "pin compatible" with all other flexfit gpus. HOWEVER, since the gpu is soldered onto the motherboard, you can't remove it.
Flexfit is more important during the "Design" of the motherboard.
Why? because the manufacturer can use the SAME motherboard, and put 2-3 different GPU models on it.
What benefit does this have?
Simple, look at several Hp laptops such as the presario 2800 series or the evo n800 series. They use the following gpus: mobility radeon 7500, mobility radeon 9000, mobility FireGL 9100
All those systems use the SAME MOTHERBOARD, except for the more expensive models, thanks to flexfit, they didn't have to redesign the motherboard in order to use a different GPU during the design-time.
However, once the motherboard has a Gpu, that gpu is on there forever.
Thus flexfit is a benefit during "Design Time".
If you are interested in "Upgrading" your laptop graphic card, Alienware and Dell are your only options, as they sometimes (in some systems) utilize a removable module that contains the graphic card on it.
NOTE: The removable module is NOT a "graphic card". The connections these "removable modules" use are NOT a standard. In fact, there isn't even a name for the connection. Thus alienware graphic solution modules will -not- fit on dell systems, and dell's won't work on alienware systems.
Compaq/Hp used a similar tactic on the X1000/nx7000/zt3000 series notebooks (They're all the same internal notebooks, so you can swap the cards between the 3 notebooks, but there aren't any great options anyway).
If you are totally intested in "graphic-card-upgrades" on laptops, the future is either With Nvidia's "MXM" or Ati's "Axiom", for PCI-Express-Mobile solutions.
Currently there hasn't been an implementation of either, but we'll see what the future holds. It won't benefit current systems, but future systems might utilize such features...only time will tell.
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