1 - Power Akoustic is not known for "quality" products. As a general rule, you get what you pay for.
2 - There is no VGA input. That means you'd have to downconvert you PC's video to composite, which will lower the image quality.
3 - You won't have touchscreen control of the PC. If you can somehow reverse-engineer the touchscreen to work w/ the PC, you'll lose control of the unit itself.