There isn't that much overlap if you care about gaming. Most touch screen models don't have GPUs. Most laptops with GPUs don't have touch screens. The Razer Blade 14, for example, is lightweight and has a good GPU, but no touch screen.
There are some which fit the bill, but which still have that crappy 1366 x 768 resolution. The Gigabyte U24T for example is 3.8lbs, touch screen, GeForce GT 750M, but I've found that some work requires more than 768 pixels vertically, so I'm not considering it.
Here are the ones I've seen. Some I've mentioned before. All have touch screens and GPUs, at least 1600 x 900, and there's some way to get a 256 GB SSD into it (though that may requires upgrading it yourself). All are 6lbs are less. None are less than 4lbs.
Sony Fit 14. 4.2 lbs, 3rd gen CPU, 1600 x 900, GeForce GT 735M (2GB), 256 GB SSD, 8GB memory, optical drive. $1150 as configured. My second choice if the Acer V7 fails to materialize.
Asus n550JV. 15.6", 5.9 lbs, Haswell CPU, 1920 x 1080, GeForce GT 750M (2GB), 256 GB SSD, 8 GB memory, optical drive. Most places don't have it with a SSD, but you can get it configured that way from
XoticPC. $1255 as configured.
Acer Aspire V7. 14", 4.4 lbs, Haswell CPU, 1920 x 1080, GeForce GT 750M, 256 GB SSD. However, this is somewhat hypothetical, since only "first look" articles talk about these specs. Actual units for sale are earlier versions with 3rd generation CPU and 1366 x 768 display, or lack the SSD. This is what I want if/when it comes out. August maybe?
Samsung Ativ book 8. 15", 5.6lbs, 3rd generation CPU, 1920 x 1080, Radeon 8770M. Impossible to buy with a SSD, so you'd have to add about $180 and do that yourself. There's some discussion of the SSD upgrade at the NoteBookReview forums. I'm not sure if it's a 7mm or 9mm space, but lots of people have done it. Price is $1200, so $1400 if yo include the SSD upgrade.
Lenovoa IdeaPad U430. 14", 4.2lbs, Haswell CPU, 1920 x 1080, GeForce GT 730M, 256 GB SSD. Not yet released, "3rd quarter."