Not disagreeing just adding.
Anyone wanting a 13" should wait for haswell unless Apple starts putting in dedicated GPU's. 100% video performance increase seems to be the projection and 10-15% CPU.
From Anandtech:
"You can expect CPU performance to increase by around 5 - 15% at the same clock speed as Ivy Bridge. Graphics performance will see a far larger boost (at least in the high-end GT3 configuration) of up to 2x vs. Intel's HD 4000 in a standard voltage/TDP system. GPU performance in Ultrabooks will increase by up to 30% over HD 4000."
http://www.anandtech.com/show/6355/intels-haswell-architecture/14
Yes, that's why I am waiting for Haswell. Big battery life. And an increase on both CPU and GPU performance wouldn't hurt either...
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10% does not seem likea huge deal, battery life is also not a big deal
so buying retina is your option, good to know
If a 10% performance increase and a larger battery life are not reason enough to wait until June, then you should buy it now. But keep in mind that the new release will probably get a spec bump in the video card. The 15" version has a 650M GT and the 700 series will be certainly faster. The SSD will probably not get any increase.
I would buy the retina version, basically for three reasons: (i) the retina IPS display is amazing and definitely much better than the TN standard resolution screen of the non-retina Macs; (ii) it comes with SSD standard, which is way faster than an HD (have you ever tried one? you'll never going back to HDs); (iii) it is lighter and thinner than the non-retina version. I don't care about the lack of optical disk drive...