US Digital Linear strips/encoders

In email from Clark at US Digital I found out:

"We presently have resolutions of 360, 300, 200 LPI and lower that we
can sell and ship to you immediately. The strips are $2 per inch,
and the matching HEDS-9200-xxx optical encoder module are $25 each.
...
Yes. With the 360 LPI strip, you can resolve down to 1/1440th of an
inch if your interface electronics can do the X4 counting."

Is 1/1440 close enough for most stuff a home mill would be asked to
do?

Dave WC0H

PS Clark also wrote:
"The new EM1 optical encoder module and the new linear strip
resolutions of 250 and 500 LPI offered with that, I am estimating
that we are 8 to 10 weeks away on that. We will for the first
time be able to offer index strips with index marks on them as well.
"