Here's the URL: nexdock.com/touch/ and here's a screenshot from the page, anyway:
There's a complete lack of specs or details, so I'm guessing what's happened is that enough NexDock 2 owners started enquiring about a touchscreen variant that the company looked at the possibility. And slotting in a higher spec touchscreen was clearly found to be practical, though I'm doubting that anything more than a proof of concept has been made yet.
The $100 'reservation' price is a good deal though, given that it's refundable, and it'll give NexDock more of an idea of how many customers are actually interested. I've put down my $100 and will report on what happens in time!
I presume that the rest of the lapdock is the same spec (in terms of ports) as the original NexDock 2, and I'd expect a NexDock Touch to eventually retail at $299 or more - so if you are interested then get in quick!
Of the stated improvements, the touchscreen is interesting, but just as big a deal are, arguably, the larger display in the same form factor and the proper international keyboards - I'd gain a pound sign again, for example!