My own personal take on the new screen is.. yes it's better, but it's certainly not a 'Jeeez.. I've gotta get one of these difference'
I suppose at 68 yrs I would be considered a mature adult, thankfully a recent eye test revealed my eyesight was still pretty good, infact when I returned my first iPad to the Apple store because I was constantly fixated by a tiny spec of dust under the screen which TBH was only visible on a white or light grey screen the young staff in the store had great difficulty seeing it, though once I pointed out exactly where it was 2 of them did acknowledge it could be seen.
When someone buys a new toy, especially so when it's a little pricey, it's natural many buyers will try to convince themselves they made the right choice and will try and justify reasons why they upgraded, us men do it all the time..lol only difference between myself and a few other's is that I will openly admit it, I'm also fortunate at my time of life that I don't really have to justify what I do so much.. not financially anyway.. otherwise I'd never be changing my cars either, and look how much new cars cost. ;-)
When I first showed my wife and my 2 sons my iPad 3 their response was similiar to the OP experiences, though after putting up some text pages alongside the same pages on our iPad 1 they then said they could see a slight improvement, but all stated it wouldn't make them go out and buy it. TBH I didn't need much convincing when deciding to buy, as I skipped the iPad 2, and knew the wife would have fun with my iPad1 64gb/3g, as she already used it, as much as I did, plus the fact I would'nt miss the cash much anyway, so I knew months ago I'd be getting the new model when it was released. I should add, I may not have been quite so keen if I already owned a iPad2... I honestly don't know.
Since then, the eldest son has also bought a iPad 3 himself, and passed his iPad 1 onto his eldest lad, so perhaps he was more impressed than he let on..lol
I like mine, if only because the wifi is much faster at loading web pages ect compared to our iPad1, and it is noticable lighter than the iPad1, my own first impressions of the screen possibly due to all the hype it received I did initially feel a touch underwhelmed.. maybe I was expecting it to be even better...lol.
Having had it for 3 weeks, I have noticed the improvent more, the text is sharper, and better defined, and IMO images and films look a touch better too, and a Blu-ray rip really does improve films even more, though possibly not enough IMO to justify their slower rip times and much larger size.
So.. am I fairly happy with this iPad 3, yes.. I suppose I am, the new screen is definately better, and after using it for a while now I can tell the diffence right away when I look at the older model.
It's a shame UK users will never benefit from the iPad3's 4G capabilities, that would have been worth having, but it looks like this won't happen till future models come along.. However, I do like the other small things, such as it being faster, both in use and for browsing the web, plus the camera's may be useful at some point, but for me I doubt I'd use them very much. When I tire of it or upgrade again, no doubt the grandkids or someone else will be holding their hands out...lol
even when both were running side by side! 
but to me and im sure to a lot of you guys the difference was like night and day! the new screen is so much sharper/clearer ,colour is better ,everything about it is better imo. does anyone else NOT see the difference between the two ipads when run side by side? are my folks mutants or something?!? lol.
