My iPhone 4 does it's job well but man have I noticed it chugging and starting to get a little lazy. I don't think I could do another year + and wait for a 6 in 2014.
Just my thoughts though
My iPhone4 is still on 5.0.1 and jailbroke. Since I backed up my blobs I should be able to restore back to 5.0.1
It's been kind of sluggish here lately.
I've been thinking about doing a wipe and loading it as a new phone and keep it ticking along.
I wanted the Note2 but if there's a chance of an iPhone with a 4+" (4.3/4.8") next year I think I rather have that. I don't want to sign a contract for the 5s if it's just going to be a spec bump which I think it will be.
I think I'm going to hold out this year if that's the case. I'll probably pick up an iPad mini this year though