Yes the rhoelements application can be developed with HTML5 on MC3190.
But I have needs the RhoElements, correct?
Without RhoElements the HTML 5 application not run, correct?
RhoElements it's required on the Windows Mobile/ Windows CE 6 machines to have the Webkit rendering engine.
Without it you're stuck to the native Internet Explorer 6 mobile--> no HTML5.
If you need more info, reach out to me