Please list ONE application that requires a faster CPU clock speed.
Please list ONE application that requires a higher screen resolution?
Better battery life isn't possible with today's current technology or for that matter the next six month.
Lighter iPad isn't possible with today's current technology or for that matter the next six month.
Thinner isn't possible unless you want to GIVE UP battery life.
New design? Why would you want to change something that actually works?
My advice, go play with an Android tablet for a few months and then come back to discuss this.

