So you can run them they'll just be slow? And could Chrome Frame be modified to run Chrome apps in IE at full speed?

Edit: just to be clear, without VirtualAlloc() and VirtualProtect(), you can't really run any JIT. No LuaJIT, no PyPy, no Java. No Scala, Clojure, or jRuby either.

It may be possible, Google may opt to release Chrome on it (or someone may port Chromium) but the lack of an optimizing runtime will probably make it suck when compared to IE.

Yeah, V8 doesn't do that. Meaning the effort to support Windows 8 RT will/would be large and possibly with little reward.

Chrome could use the IE10 JavaScript engine presumably (depending on how easy it is to hook native APIs back into the rendering engine from JavaScript).