The new design, which includes a red 20 shekels note, a green 50 shekels note, an orange 100 shekels note, and a blue 200 shekels note, will have new portraits and improved security measures. Another change that is intended to assist the vision impaired is a variation in the size of each of the notes.
The first release (mid 2013) will include the 50 and 200 shekels notes, with the 20 and 100 shekels notes to follow in early 2014. There is no indication that coins will be redesigned.
Since most vendors accept US dollars, these changes should not have any serious impact on tourists.