If they succeed in reflating the bubble, or creating another bubble, the bust will come sooner and will be far worse than the housing bust.
I do think that we are repeating the same mistakes we have made during this decade, which means that there is a bubble coming somewhere.
It may be bigger than the housing bust, though that his hard to see. The mechanisms which financed and facilitated the growth of the housing bubble - i.e. the shadow banking system - have been absolutely destroyed. So even though there is an enormous amount of liquidity in the system, it must find a way into the financial system first before it can cause a bubble. I am betting it will, but by how much, I don't know.
BTW, the only asset I know of that is near its all-time high is gold. I have been slowly buying options on gold. A break above $975-$1000 could be significant.