Win A Digital Slr Well-written, Well-designed, Excellent Primer Why Won't Digital Camera Makers Put The Big SLR Sensors In Compact Cameras?

Why won't digital camera makers put the big SLR sensors in compact cameras? - win a digital slr well-written, well-designed, excellent primer

That does not bother me the full price for the digital SLR camera for the convenience of a small portable device to pay. I know, that Leica and Sigma have shown what can be done. Why do not all low-cost Japanese manufacturers have to do this? I just want the noise free picture of a DSLR without the extra size.