lol at Phillips not noticing the Wii's existence for five years.
They're taking Nintendo of US to court for deliberately and without permission using tech that they (Phillips) say they patented, and are seeking to make sales of Wii and Wii U in the USA illegal, and to obtain substantial damages.
Law isn't my strong suit, especially US patent law, so I'm not going to make a prediction, but it sounds like the usual US patent trolling to me - which usually results in multiple counter-suits.
1996 - the date of Phillips'
patent for motion-control pointing devices
2006 - launch of the Wii
2011 - Phillips contact Nintendo on the subject
2014 - Court petition