The most recent ESXi updates will incorporate a change in TPS. Due to security (KB 2080735) considerations, TPS will be disabled by default.
As a vmadmin, your next question would be how much am I losing with TPS gone ?
Thankfully there is a tool to quantify exactly how much TPS is going on - credit @vmMarkA and @vBrianGraf.
As it turns out, our main clusters are only seeing 2-5% TPS savings (mostly zero pages) so this change will have no real impact. I can imagine VDI type workloads could be the most impacted by this change - what are the max TPS numbers folks are seeing ?