A smartphone is essentially a multi-purpose device you carry with you. It's a phone, digital camera, digital camcorder, GPS unit, MP3 player, computer, game console, clock, alarm clock, timer, stopwatch, internet browser, address book, and more. There's a reason they call them a "smart" phone. They do pretty much everything. And they do pretty much everything very, very well. You're not really sacrificing anything and getting everything with a smartphone. Many now have digital cameras that rival much more expensive digital cameras. The amount of stuff they cram into a smartphone is impressive.
Once you get one, you'll likely feel a bit overwhelmed. Just understand that it's like trying to learn twenty or so new devices at once, so give yourself some breathing room and just relax. Focus on one feature at a time and in no time, you'll be a pro. Maybe start with the camera and just play with taking photos and videos for a day or two. Then maybe try out the GPS function on a short trip to shop or something. Even if you know exactly where to go and how to get there. Just take baby steps and in no time you'll have it all figured out.
Fly!!! Eagles!!! Fly!!!