Since Eclipse IDE can run in Linux and the new Honeycomb has a Linux Kernel, can Eclipse IDE run in Android Honeycomb ?
I know that isn't pretty much comfortable coding in a tablet, but I'd want to use for UML modeling.
No. Linux distributions are more than a kernel, and Android does not have all the components. For example, you cannot run Eclipse on Ubuntu Server without installing a desktop environment.
Also, Eclipse requires Java runtime on a device in order to run, but Android does not support the complete set of J2SE.
I think this has to do with the architecture, Eclipse depends on SWT, and SWT has to be compiled for each OS/architecture combo separately
Android is ARM based, and SWT (As far as I know) only supports x86 and/or x86_64
Besides, you can't do anything huge with these devices because they still haven't reached the point of being powerful enough to support large projects with a lot of includes or libraries