Good point and thank you for bringing this up.
Here is some really good commentary I found on the topic:
http://www.anandtech.com/show/5872/i...abook-review/2
Quote:
It appears from the review slides that there are some versions of the above Ultrabook with 8GB RAM, but our sample included 4GB DDR3-1600 from Samsung in a dual-channel configuration. As well see in a moment, the RAM is soldered straight onto the motherboard, so theres no upgrading it. This isnt a huge issue for our benchmarks and testing, but if I were an end user I would definitely go straight to 8GB these days (assuming you can find such an Ultrabook). For one, opening up an Ultrabook is typically more complex and/or frustrating than getting at the RAM/HDD in other laptops[/b], but more importantly it looks like most Ultrabooks are soldering RAM onto the motherboardthe extra thickness of an SO-DIMM might not seem like much, but when youre trying to get under 18mm every bit of savings counts!
8 GB "soldered in" vs. 4 GB "soldered in" + the ability to upgrade to another 4GB? (Impact on Form factor size?)