Gigabyte Booktop M1035 Dock brings GeForce GT220 Graphics to the netbook – What is the point?

The 13.3-inch Gigabyte Booktop M1305 can now have NVidia GeForce GT220 DDR3 1GB discrete graphic chipset solution. However, it is there in the dock and is not being offered as an addon for the netbook itself.

Specifications:

• 13.3-inch display
• 1366 x 768 resolution
• a Core 2 Duo CULV processor
• 500GB HDD
• 4GB RAM
• GS45 chipset + GMA 4500MHD graphics (via dock)
• Wi-fi b/g
• Ethernet
• Windows 7 Home Premium

It comes with 3800mAh 6-cell battery.

Do we really need to have a graphic card in the dock? I’ve a rig at home for the times when I need graphic power.