I think it really depends on your usage case. What do you plan to do with it? Is this a main computer or are the MBA/iPad supplemental?
Open up a 300MB PDF on a MacBook Air -> nightmare.
Open up the same 300MB PDF on an iPad 2/3/4 -> smooth sailing.
There are many things that the iPad does better than the MacBook Air, and vice versa. Personally, I see it this way:
If I read more, browse the web more, type documents occasionally (less than a book but longer than 3 paragraphs), use spreadsheets only to calculate my monthly expenses, then... I'd grab the iPad.
If I need something to move around a lot of data/files, something I can use to compose a whole book, something I can use to analyze monthly suicide and homicide trend data, something to connect to an external projector to show off a 3D nude model of this female character, something to program the next doomsday device, or something I can use as a sign for people to know that "I'm serious about my work", even though all I'm doing is browse Facebook all day, etc... THEN... MacBook Air for sure.
By the way, half of it is sarcasm, the other half really is trying to say: get the MacBook Air if you want to do something serious with it.
PDF viewers for OSX must be downright terrible if an iPad is delivering better performance with a vastly slower cpu, much less ram and considerably slower storage.
It's the same for Windows. iOS makes very heavy use of the GPU to render things, so it does a lot of things smoother than conventional OSes.
Same thing for Android, actually... starting from ICS.
Could you link me to some huge PDFs? I want to test this theory... It's not that I don't believe you. I just want to see it for myself.
Could you link me to some huge PDFs? I want to test this theory... It's not that I don't believe you. I just want to see it for myself.
It's the same for Windows. iOS makes very heavy use of the GPU to render things, so it does a lot of things smoother than conventional OSes.
Same thing for Android, actually... starting from ICS.
Here's a direct link to Engadget's latest Distro issue:
http://stadium.weblogsinc.com/engadget/distro/112312_DISTRO_book.pdf
Scrolling should be fine in it with some micro stutter, but zooming... not so much. I have tried it on a 12-core Mac Pro and zooming is still not as smooth as on an iPad.
It's much worse with a big vector technical document... but it's too bad I couldn't find any of those.