You won't be losing a valuable PC-card slot. Think about the weight of the laptop. These lighter laptops can certainly help prevent sore shoulders as you trudge through the airport grabbing your next flight, but they do have limitations. In most cases, the lighter laptops have separate CD ROM and floppy drives which you must toss into your suitcase. These are essential for those who need power wherever they go.
Heavyweights usually function as desktop replacements.
They are not intended for travel and weigh in at eight pounds or more. Other options to watch out for include your screen size and resolution. If you are making presentations on the go, you will want to have a screen that's at least 15 inches wide. A built-in Ethernet adapter is handy for quick plug ins into hotels or company networks. An additional perk to look for is a Wireless Telephone Connector that allows you to surf the net away from a phone line in emergency and quick fix situations.