Both are important and both will be around. However if you are starting out today I would pick mobile app development. Two main things 1. Web development is pr

Both are important and both will be around. However if you are starting out today I would pick mobile app development. Two main things 1. Web development is primarily about presenting document oriented information to users. The future is sensors in and around mobile phones - cameras, video, voice, fingerprints, retina scans, gyro, barometer etc etc. These are not document based and the web model doesn't lend itself well. It will be another 20 years before any standardization of sensors based internet will come to pass. All of the sensors will be native based and a mobile development mindset will be asset. 2. Webdev is 20 years old now. Even though there is a lot of work, there are a lot of people and barrier to entry is low. If AngularJS takes off, you will have a long list of people who have been working in this field competing with you. You will start at the bottom and need to put in the time. Mobile is only 4-5 years old. Even then, the pace is so fast that knowing iOS3/Android 1.x (3 years back) doesn't help you. So you have a shorter ground to cover to becoming an expert.