OK, what about for DX10, DX9. Both iGPU's will support that. An AMD Radeon HD 6450 can embarrass a SB iGPU in those settings. For an iGPU three times more powerful than that... it's gonna be a bloodbath.
The only thing SB iGPU is good for is basic flash games and playing movies. You can do that on E-series APU's, for way cheaper. For corporate/business desktops and notebooks, people who cant/don't want to play games, just have basic media consumption, you don't need a SB CPU. If you need the CPU power, then you can get SB, until you realise that apps are being accelerated with OpenCL, DirectCompute to perform better on GPU's. Then you wish you had more GPU, because in the benchmarks where SB CPU beats AMD Llano x86 CPU, AMD has a nitrous button and boom! APU accelerated parallel processing in Photoshop, Office, video editing, etc.
SB is a great CPU, and offers lots of performance. But the world is moving to GPU accelerated applications, and SB iGPU is weaksauce. IB isn't going to magically jump to $75 mainstream graphics performance, it's going to remain sub $30 dGPU competitive. Great generation on generation increment, but objectively, lacking behind the competition.