Really, if you could get by with just an ipad, you probably didn't need a laptop in the first place anyway.
The ipad is next to useless for heavy technical work. It's brilliant for consumption and light tasks though. Sort of reminds me of how a fridge is great at keeping things cool and a toaster is great at toasting bread. Not sure how well my fridge would toast my bread.
Oh yeah, and tethering works pretty well these days.
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Actually you've 2 other major problems. Ridiculously small physical screen real estate, and lack of precise pointing device such as mouse or trackpad.
This all but assures that the standard form factor tablet will never be a viable solution for heavy work, even if you could natively run a desktop OS at full speed.
The old tale of content consumption, not content creation
The iPad works great for heavy work (I have no idea what you mean by technical); it actually has almost the same amount of screen real estate as my 11" MBA, and more screen real estate than a 13" Macbook Pro IF you use it in portrait mode, and IF you use Pages to write something; and navigation of documents is quite easy with the keyboard commands on a bluetooth keyboard.
Never say never. For your work, the iPad may be a poor fit, but for mine, it is perfect. As for OSX, I rarely need it, as the iPad covers most of my work tasks. The remote login option is a nice fallback to have.