ipad vs Macbook Pro with retina display?

[基隆河]

i currently have a 13 inch macbook pro bought in 2011. its 1.5 years old. the benchmark of it its half of the benchmark for retina macbook pro. i compared the results online. i usually use my mac for web browsing, facebook/twitter/youtube/espn/yahoo/google thoses sites. i also use it to write/check emails and do some search for my papers, which means i use microsoft word/excel/powerpoint. i wanna buy an ipad 4. i can do almost everything i do on my mac on ipad 4 except microsoft. i wanna know if it is worth to upgrade my macbook to the retina one if i already owe an ipad? i do some video editing from time to time. i also watch live streaming tv like espn/mlb tv on my mac. they all require better processor so im thinking about upgrading. but the price is the problem. because if i already owe an ipad, i would just use the retina macbook pro for video editing, mircosoft and tv streaming. spending 2000 on doing those stuff seems a little too expensive. so should i buy the retina macbook pro and ipad 4 or just ipad 4 or just retina macbook (ipad is cheaper plus i can play more games like nba 2k, fifa, fruitnija and use mobile apps on it)