Others will chime in on this with the technical reasons, but there isn't a noticeable difference in the 5 mp camera and 8 mp camera on cell phones. I take pictures a lot, and imho very good ones
and send them to people and post them on Facebook and such. EDIT: I would recommend you take a look at the sticky at the top of this forum of examples of pictures taken using the EVO 3D. There are a lot of really great ones.
I am very happy with my EVO 3D and would recommend it. You don't have to use the 3D feature if you don't want. I didn't think I would use it at all but found myself taking more and more pictures and video in 3D.
I don't know how interested she is (or if you are interested in such things either) but I use the MHL full mirroring of my phone to my HD tv a lot. You do have to purchase the adapter separately, but it allows you to see anything that is displayed on your phone's screen onto your tv. For example, I was able to stream the RedZone channel from my DirecTV app from my phone to a friend's tv. The thing is, if you have 3D content and want to display it on a 3D tv you can do that, too, or if your tv is a 2D tv, it will still display the 3D content only change it to 2D format.
For me, the phone is fast and responsive, and I like the web browsing experience a lot. I don't even use the mobile website versions because browsing on the full site is great.