IPad 2 vs iPad 4, which one should I get? - 2

There's no doubt the iPad 4 (iPad with Retina Display) is better, but it also costs $100 more.My question is, is it really worth the extra $100?

Here are its benefits over iPad2:

A much more powerful processor - A6X, which is advertised and proven as twice as powerful
A higher resolution - 2048x1536 (iPad 4) vs 1024x768 (iPad 2)
Better cameras
1080p video recording (iPad 2 only has 720p) and more video features
Bluetooth 4.0 (iPad 2 only has Bluetooth 2.1 + EDR)
New Lightening Connector
Siri Intelligent Assistant
Double the ram I believe? (1gb vs 512mb)

So are those worth the extra $100? If I go for the iPad 4, can I buy a wireless mouse and use it as a laptop? Does it have enough processing power and ram for that?

Thanks in advance.
>>> IPad 2 vs iPad 4, which one should I get? - 2