If the NX is a huge success then its a given that it will get ports of multi-format titles including huge multiformat titles that have sold very well a few months before the NX launches. If the launch is poor then it will get very little. There is also the issue of how powerful the NX is which may prevent some ports and also how the NX is positioned in the marketplace. If its mainly a younger userbase then it won't get more mature titles.
I certainly hope the NX is a huge success and gets brilliant software support. I suspect the reason to buy an NX will be as ever Nintendo's own titles with only a few third party titles worth bothering with but we shall see.








