Some time ago, I attended the Windows Mobile Smack Down, a sneak preview of Windows Mobile 6.5. And it became very clear: my next device will probably be a Windows Mobile again. I had a Tytn II before my E71. A very powerful device, but practically unusable without the stylus. The fact that HTC added his own UI on top of Windows, is not really an elegant solution for me. And yes, one of the major improvements of 6.5? The usability with just your fingertip. That and a better personalisation are key features for me that I missed on previous windows mobile devices.
I will probably have to wait until september to get my hand on a new device with 6.5 preinstalled. As the hardware requirements seem to be different for this release, it is better to wait than to upgrade.