VAAI on vsphere standard?

I thought VAAI only cane with vsphere enterprise?

I've been running our replacement vsphere cluster in eval mode until just now when we've lost our old 3.5 boxes, so I entered our vsphere keys into vcenter and applied them to the hosts, and whilst things like FT and Storage vMotion are immediately unavailable, the "Hardware Acceleration" column next to the datastores still shows "Supported"?

Thanks.