I contacted HTC about when the Incredible will be getting the new Sense update. Below is the email I got back... it doesn't sound like they plan on updating it anytime soon.
Dear Nay,
I understand that you would like to know if you will get an update for your Incredible for the new HTC Sense. Before releasing a ROM update we have to be sure that the software is going to work properly on your hardware and on your carrier’s network. This testing does take some time but will result in an update that is optimized to work on your device, on your carrier’s network. While we want to release software as soon as we can we will only do so once the software has passed our quality standards.
At this time we do not have any information about an update for your device. When the update is released it will be announced on HTC.com.
To send a reply to this message or let me know I have successfully answered your question log in to our ContactUs site using your email address and your ticket number 10USCW45ENA00160.
Sincerely,
Victor
HTC