Should you wait for the next iPad?

I think that it's reasonable to expect the following features in the next Apple iPad:

• Webcam (probably two: front-facing plus back-facing so that you can do FaceTime)
• Widescreen resolution? (Android and BlackBerry tablets are coming out as 7" widescreen models. Will Apple make a 7" iPad?)
• Better battery life
• Better performance
• Retina display 
• Lower price? (doubt it)

If we follow the evolution of the iPod touch, we see that Apple made similar changes from the 1st generation to the 2nd generation to the 3rd generation. The addition of a camera (or two) would be a huge upgrade for those who like to Skype or do FaceTime.
 
So, should you wait for the next version of the Apple iPad? What if you knew that it would be available in the first quarter of 2011?