depends on how u use it.
video editing for family video is going to be fine, but it will take a little longer to finish than the current line up mbp.
im making tshirt design, i work with 300dpi with 4000 x 5000 pixels, my 17" mbp with core 2 duo 2.66ghz and 8GB of ram plus corsair SSD is working just fine with it. the only lacking thing from the mba is only its 4gb of ram.
so if u're woking with big images in photoshop or doing video editing, make sure your mba not running so many apps because it will eat the 4gb ram pretty fast. hell the mba even has less memory than 4gb because of the shared memory VGA thing.