Microsoft's booth had a slew of other tablet PCs and netbooks displayed. A few prototypes that made it to the event included Lenovo's Idea Center, that looked really sleek with an 21.2-inch display, Intel Pentium 4400 Processor, built-in speakers amongst other features.
However it seemed like this was more of an All-in-one PC rather than a slate/tablet as I seriously doubt anyone would walk around on the streets of Anywhere using this like it was some over-sized iPad.
LG also had a tablet on display amongst the plethora of other tablets and slates displayed at the booth. A few other companies that had their wares showcased at the Microsoft booth was this colorful little number (image below) running on what they call the SABRE platform with a custom UI seemingly designed for multimedia.
Another company called Cynovo also had their C7 tablet with it's 7-inch multi-touch supported touchscreen and Intel Silverstone CPU with GPS and 3G support as well as a 1.3MP camera thrown in for video chatting.
With regards to the design, it felt a bit too bulky fort my taste and it wasn't half as sleek as almost all of the others around.