How much has Intel really improved integrated graphics with Haswell’s HD 4600?

Intel has spent a lot of time talking about its new “Iris” graphics on upcoming Haswell parts, so much so that you could be forgiven for assuming that it would be standard. That, however, is not the case. While Iris and Iris Pro represent the best Intel has to offer, many computers, from desktops to tablets, will have to make do with Intel HD 4600.