As others have said - and to be fair the article makes clear itself - the major factor is distance.
If you are going to be sitting fairly close to the screen when playing/watching then even on smaller TVs you will see a noticeable improvement with 1080p - particularly with sports and action movies and fast moving games.
Secondly, going forward more and more content (even games potentially) will be in 1080p, so buying below that now may reduce the potential lifetime of your TV.
Of course, money is money, and a 720p or 1080i TV should serve fine for the foreseeable future, and will be ideal with a PS3 or 360.
But if you can afford it, going 1080p is simply a better choice and the cost differential between 720p and 1080p TVs is dropping all the time.
For videogames right now 720p is probably the key resolution for consoles, with 1080p the resolution if you really intend to watch BR movies and 1080p programmes.
Of course, on PC, as others have said, 1080p has long been old news!
Try to be reasonable... its easier than you think...
