Would you buy a tablet keyboard case that could fit any size tablet?

[blueaardvark]

The tablet keyboard case will hold any size tablet up to 10.2" and will include a wireless keyboard. It will be much better quality than most of the others and would cost about £29.99. Would you buy it if i made it?

 

[Natey2]

Some thoughts...
People usually buy a 7" tablet (over a 10" tablet) for portability. Building a 10" case for a 7" tablet defeats the portability to some degree.
A small keyboard is not as nice as a standard PC keyboard. My 7" case keyboard is not as nice to type on as a full keyboard. I suspect a 10" keyboard would be nicer.
How do they keys feel? That's a big factor for me when considering an external keyboard.
Battery life - would a wireless device drain the battery faster than a wired device?