If you have a surplus of money, yes.
In most other cases there is not much that is new with the iPhone 6. Its 4.7 inch screen still has a weird resolution of 1334 x 750 (326 ppi) but due to its smaller screen than most phones now a days, it's impossible to tell it apart from a 1080p (1920 x 1080) screen. The viewing angles are still great, and apple have incorporated a new feature into the OS. By double tapping (not clicking) the home button the screen is lowered down to reach the top buttons of the app that you are using. The processor has been given a refresh and it runs iOS 8 with no hitches. Due to the extremely thin nature of the phone, battery life wont be drastically improved, but thanks to Apple's amazing optimizations and battery saving techniques, the phone should last throughout a day of medium use. All in all, its the new thinner design and bigger size that changes, and if that's what you want, then go ahead and buy it.
Yes, iPhone 5 is iPhone 6 and they call it iphone 5 because they never have an iPhone 5 yet but it is iPhone 6.
Yes, both iPhone 6s and 6 is equipped with a 4.7-inch display.
Yes it will, Both iPhone 6 and the iPhone 5 have the same lightning port on the bottom.
You can use the same SIM card for your iPhone 6 that you used in your iPhone 5.
Yes and also an iPhone 5
Yes and also an iPhone 5
The iPhone 5 will run iOS 6 or iOS 7.
There is no iPhone 6. The iOS can be downloaded to earlier handsets, yes.
iPad 3 (or iPad Retina Display) is out yes. iPhone 6 is not, but iPhone 5 is.
There is no iPhone 6, as of March 2014. There is no way to know the difference between the iPhone 5 & 6 until the latter is released.
Gruen Planet - 2011 iPhone 5 2-6 is rated/received certificates of: Australia:M
iPhone 2g -2mp iPhone 3g -2mp iPhone 3gs -3mp iPhone 4 - 5mp iPhone 4s - 8mp iPhone 5 - 8mp iPhone 5s - 8mp iPhone 6/Plus - 8mp iPhone 6s/Plus - 12mp
Two weeks, three days and seven hours before the IPhone 6
It is really up to your personal preference if you want to wait for the iPhone 6 or upgrade now. There is a lot of speculation the the iPhone 6 will be a great phone.