From what I can see on Lenovo's US site, the T460p is not yet available for sale.
The T460p and Y700 serves different markets. The T460p is a high end semi-rugged laptop that can survive a bit of punishment like being dropped 6 feet onto a hard floor with no internal damage. The Y700 is an entry level gaming laptop that is about 1 lbs heavier than the T460p. Drop the Y700 6 feet onto a hard floor and you are going to have problems. The T460p has features that corporate IT department will probably find useful, but not so for an average person.
A compromise is probably the 15.6" Dell XPS 15 9550 series. It is only slightly heavier than the ThinkPad T460p at 3.9lbs, and it is Infinity Display means it has very narrow bezels which means the laptop is only slightly larger than the average 14" laptop. All models with the exception of the least expensive version has a GTX 960m so if you want to play games on the laptop, you can.
The $1,200 model has a quad core i5-6300HQ CPU & 1TB HDD while the $1,450 version has a core i7-6700HQ CPU and 256GB SSD. Similar to the desktop variants, the Core i5 lacks Hyper Threading (HT). You need to determine if the programs you use can take advantage of HT.
http/www.dell.com/us/p/xps-15-9550-laptop/pd
It is a good compromise between the T460p and Y700. You get the following:
Pros:
+ Quad core CPU (i5 or i7)
+ 15.6" display in a more or less 14" laptop format
+ Costs less than the T460p
+ Same GPU as in the Y700 for games.
Cons:
- More expensive than the Y700
- This is not a semi-rugged laptop so a 6 feet drop onto a hard floor is something to be avoided.