Having acquired both a 15 inch macbook pro as well as an iPad wifi (not the 3G+ wifi version), I write this for those people who were wondering how these two work together. A common hypothesis was to pair a 17" macbook pro 2010 with an iPad with or without 3G and to cycle between the two for daily needs. The idea was that for light activities such as writing or surfing the net or just watching non 1080p videos i.e. youtube as well as doing light work like excel or word or powerpoint slides on the go you can take the lighter 700 grams or so of an iPad. Well to be more specific on the weight, the pad is 680 grams without 3g and 730 grams with 3G. It still remains easy to carry in the hand, but not as flexible as if you were holding a folder of A4 paper. You can lie down and use it when on the couch or sofa or even the bed, or raise it above your head while watching movies or surfing the web although if you are raising it with one hand for an extended period of time that would probably get tiring.

Compare that to the 2010 macbook pro 15" which is 2.5 kg or even the 17" which is 3 kg, it is physically half the size, but a quarter of the weight. It certainly makes for an interesting companion device. The idea is to have a laptop that is effectively a desktop replacement unlike the macbook pro 2010 13 inch, that you can carry about when sheer raw power is required but swap to an iPad when you have less demanding needs for the day. You might perhaps lug around the 15" or 17" on a week long business trip, but perhaps for a 2 day within the country plane flight you'll take with you the iPad, and work on your presentations from the iTunes iWork set, or write out your articles. Perhaps if you are a college student you could toss in some lecture pdfs into the mix. I can see it being useful for people who use dropbox which allows you to pull up documents from a virtual place which you can stuff in from anywhere. This might be useful for courses with lots of pdfs and ppt slides which do not require edits.

Alternatively, one could look at it from a leisure standpoint. You could rest the heavy laptop on the desk while you swing over to the iPad and lounge at your coffee table. The lack of flash really depends on your personal usage settings, the same caveat that Apple usually throws applies here, if you are a flash developer or plays lots of flash games then the iPad is probably not quite the device for your current needs. If the sites you habit uses html5 due to apple, then its a whole new user experience entirely. Its something light enough to be carried around everywhere for you to flip through books, load up a game, or videos that finally makes sense to be played over its bigger screen or just kill some time with youtube.