Don't forget the most important revolutionary feature in the new Surface Pro 3. It's as thin as the original 2010 iPad. Also, you don't need features like 4G(LTE) or even 3G, Surface Pro 3 does not have anything like that. Why would it need it when it has classic WiFi. Maybe in 2018 the Surface if it's around will be as thin as the 2014 iPad.
It's also about 50x the machine when purchased in high end format, not to mention a bigger physical device to begin with by a couple inches than the iPad.
The iPad is as thin as it is because it's a consumption device with an ARM processor, and also because it has virtually no connectivity ports other than headphones out and the charging connector, where as the Surface has USB, SD, among others. You're comparing apples and oranges and failing miserably again. If you are seriously comparing the iPad, an app centric device against a full fledged PC in the Surface, we're really living on different planets.
Apple's devices would be just as thick if they had an i Series CPU in them, and you know it as well as I do. In fact, they are! The Air is actually THICKER than the Surface 3
Heavier too. Once again, the Surface being marketed as a notebook replacement, it's not really fair to compare "thickness" to a consumption device like an iPad, now is it.
As for 3G or 4G connectivity, MS did the numbers on it and came up with the figure that less than
2% of their customers felt they "needed" built in cell based connectivity. Which the Air does not come with, either. The vast majority of iPad's sold are the wifi only models, and same goes for Android devices. Again, the latter not even being in the same category as the Surface to begin with.
Since the Surface has a USB 3 port, it'd be a very stupid business decision to offer 3G/4G built in for the 2% that might ever want it, especially when a guy can buy a USB 4G stick for $50 on the carrier of their choice, just like they would be forced to do for their Mac Air's and other
notebooks, no?