Sdhc To Sd What's The Practical Difference You Feel While Using SD And SDHC Cards?

What's the practical difference you feel while using SD and SDHC cards? - sdhc to sd

I bought a Canon SD790 and have a SanDisk 2GB SD Card. I have heard people say and read SDHC say it will give you more. But concretely, what would my reaction during the operation of the camera?