Why? What's wrong with the laptop? What does making it a tablet get you?
Laptops are bulky and heavy to get one with enough power and storage space to also use as a main computer for working at home given the large datasets I work on etc.. And I don't travel enough to have a separate laptop for traveling that I'd never use at home, so I have no interest in owning two laptops.
It's much smaller and lighter to have a tablet and a keyboard case like the Zagg one, and a tablet is something I'll actually use at home when not traveling as I use my iPad a ton around the house. Unlike a Macbook air or netbook that I'd never touch at home since I'd use my more powerful and larger (thus more comfortable to type on etc) laptop at home like I do now.
So a Tablet with a more full OS would get me:
1 )A more portable device than my current laptop that I could still do most of my work on when on business trips, so I can leave the laptop at home.
2) A device I'd actually use at home like I do my iPad currently, rather than something like a netbook that would gather dust when not traveling as I'd never use a small laptop over my big desktop replacement one at home.
So that's were my interest in something more like a tablet PC comes from. A laptop is more like a desktop to me. I'd rather leave it at home as my work station, and have the tablet form factor for my mobile commuting on the road.
If there isn't something like that within a couple years then I'll probably just write a laptop purchase into one of my research grants and get a lighter laptop so I don't have to lug my heavy ass Thinkpad around.