BERKELEY, Calif. (MarketWatch) -- A new round of pad computers with various features all missing from Apple Inc.'s iPad is coming. Curiously, the most interesting one appears to be coming out of India using the hottest new Nvidia Corp. chip to power it.Already previewed at various international trade shows, a look at the specifications tells me that unless the thing simply does not work as advertised this could be the hottest and most usable pad computer on the market.From a company called Notion Ink, it's called the Adam. Compared to an iPad it has a bigger screen, twice the battery...