And a weak processor, no multitasking, fewer applications, a smaller hard drive, fewer accessories, a less durable design, no support for flash, a smaller display, lower resolution, and a non-replacable battery.
I don't think that the iPad could be described as having a weak processor. The Apple A4 chip compares very favorably with the Intel Atom processor running at less than 1/3 the clock speed.
The ARM based Apple A4 processor does have the ability for Multitasking, it just hasn't been implemented in the iPad.
http://www.engadget.com/2010/01/05/arm-demos-the-cortex-a9s-web-browsing-skills-on-video/The IPad does have a smaller hard drive but this is all SSD technology again designed to reduce power consumption.
The smaller LED backlight LCD display again has been chosen for power saving requirements. Higher resolution larger format lower power OLED displays are apparently in the pipeline. We may soon see slightly larger 1080HD resolution capable OLED displays for the next generation iPad.
The non replaceable battery and connectivity issues have always been an Apple annoyance.

I may buy one when the iPad retails for around $250 and has a 1080 HD OLED display, can multitask, can take an SDHC card, has a USB port, has a digital audio out, can play FLASH movies and can recharge itself if left on a window sill for a few hours.
Hopefully all the earlier Apple iPad adopters (yes they can serve a purpose) can bring the price down in the future for future iPad devices and someone has the good sense to change the 'iPad' name to something else.