Before purchasing my most recent laptop I tried going "without" for a bit and found that an iPad just didn't feel as smooth for video editing and some other work that I was doing at the time.
The closest analogy that I can think of is trying to go on a long-distance road trip on a motorcycle, when you're used to a luxury sedan. Could you do it? Sure. But it's just not the same ride.
Yeah, that's true. I wonder if we will get to a point where both computers and tablets have the exact same amount of power.
Even if the capability is the same, it also defeats the purpose of a tablet, i.e. more portable and convenient vs. the roominess of laptop / full workstation, especially for folks who use heavy visual design / editing apps, e.g. Final Cut Pro, Adobe Photoshop, Autodesk.