In it's current form though it's not quite at that point in time though yet is it and is still un-finished. There is also only HTML5 export now so this all really depends on when it goes commercial. I hope that will happen much later on though because then most of what i said is invalid as it would be a good purchased, otherwise i see nothing that wrong with the points i make though because you would basically be buying a beta.
I will put it this way then -
If more free versions are made and then once in a usable state the product then stops getting free updates but has a price instead i will most likely buy it.
If not and it's released i a week or two i probably won't because it's like buying a beta, a large donation or a impulse buy as it will take a while to get to the quality of Construct 1 or have a EXE exporter again.
I guess the main question is:
When do you actually plan to start selling Construct 2?