Is it worth to buy the new iPone?

I still do not have the "old" iPhone but I thought it would be a topic worth talking about the new iPhone. Question often ask by an iPhone follower is, is it worth to change and buy the new iPhone? Although Apple have not posted the price yet, it will be known next week as more people and hopefuls are craving to know the price tag.

Here is a comparison between the current iPhone and the new one.

Dimensions	115.5x62.1x12.3mm	115.5x62.1x12.3mm
Weight	135g	133g
Network	GSM 850/900/1800/1900 HSDPA 850/1900/2100	GSM 850/900/1800/1900 HSDPA 850/1900/2100
HSDPA	7.2Mbps	3.6Mbps
Storage capacity	16/32GB	8/16GB
Bluetooth	v2.1	v2.0

Apple has also made up a chart of similarities and differences between the iPhones:

(Credit: Apple)