As the lines between high-tech and high-fashion continue to blur, cosmetics companies are rolling out an array of beauty devices that make it easier than ever for a professional-looking look at home.   For example, Opté Precision Skincare's prints a foundation-concealer-serum concoction right on the face to hide age spots and blemishes. Procter & Gamble was so taken by the technology, that it took a 30% stake in Opté. Application is said to be so precise that users use less mak...