Access an Android purely via VNC enabling Tablet resolutions I can currently access my Android via VNC on my iPad.  Can I set the screen resolution of the Android to be the same as the native iPad resolution, giving me a pseudo Android tablet?

Even if there is an answer which corrupts the screen on the phone itself is fine, seeing it will be accessed via the tablet.
No, you cannot change the resolution of Android in VNC in a standard way. However, some Android phones have additional functions to support HDMI (which results in running Android at a higher resolution). If you can somehow tap into that functionality in conjunction with VNC, then you might be able to get a 480p, 720p, and 1080p option. But this is something that would be highly customized to a single phone as all of the different HDMI implementations seem to vary tremendously. One other option that would be yet another one-off possibility (with some custom work) would be if your phone supports WebTop functionality. If so, perhaps you could tap into this.

However, there is no third-party app that does what you're wanting. To do this, you'll have to develop or find somebody to develop this highly-customized solution.

As other have suggested, you're probably not going to get much better than changing the LCD Density, which clearly isn't what you're after.