Can an old dog learn new tricks?

My question is directed at people who've gone over to Apple. For a while now I've been considering moving over to Apple. I hated Windows Vista and I don't like the look of Windows 8 so perhaps now is the time to jump ship. How big is the learning curve? I have Elements, DxO Pro Optics/Viewpoint, AVS Video Converter and a few other programs, I like to surf the net, listen to music, am into Facebook and FlickR and like to watch the odd video. I travel a bit and like the weight and battery life of the Apple products. Am thinking I phone, I Pad and Macbook Pro. Advice appreciated.